Algebra questions. Please explain ... thanks?

6a - 13 = 9a - 15
3a = 2
a = 2/3

Answer: a = 2/3
---------
32x + 18 = 20x - 10
12x = - 28
x = - 28/12 or - 7/3

Answer: x = - 7/3 or - 2 1/3
---------
4t + 7 = 7t + 7
2t = 0
t = 0

Answer: t = 0
---------
- 3(p - 4) = 21
p - 4 = - 7
p = - 3

Answer: p = - 3
---------
5(2x + 3) = 25
2x + 3 = 5
2x = 2
x = 1

Answer: x = 1
---------
5(a + 3) = 4(7 + a)
5a + 15 = 28 + 4a
a = 13

Answer: a = 13

Jim made a 35% % earnings on a sale of $670. this ability his value PLUS 35%. So the equation that describes that's: one million.35x=670 Divide the two facets by making use of one million.35 to get $496.30 Jim paid $496.30 for the statue

1)
6a - 13 = 9a - 15
6a - 9a = 13 - 15
-3a = -2
a = -2/(-3)
a = 2/3

2)
32x + 18 = -20x - 10
32x + 20x = -18 - 10
52x = -28
x = -28/52
x = -7/13

3)
4t + 7 = 7t + 7
4t - 7t = -7 + 7
-3t = 0
t = 0/(-3)
y = 0

4)
-3(p - 4) = 21
p - 4 = 21/(-3)
p = 4 - 7
p = -3

5)
5(2x + 3) = 25
2x + 3 = 25/5
2x = -3 + 5
x = 2/2
x = 1

6)
5(a + 3) = 4(7 + a)
5(a) + 5(3) = 4(7) + 4(a)
5a + 15 = 28 + 4a
5a - 4a = 28 - 15
a = 13

6a - 13 = 9a - 15 add 13 both side
6a=9a-2 substract by 9 both sides
-3a=-2 divide by -3 both side
a=2/3

32x + 18 = -20x - 10 add 10 both sides
32x+38=-20xsubstract 32 both side
38=-52x divide by 38
38/-52=x

4t + 7 = 7t + 7 substract 7 both sides and substract 4 t in both sides also
0=3t divide by 3
0/3=t

-3 (p-4) = 21 divide by -3 both side
p-4=-7 add 4 both sides
p=-3


5 (2x+3) = 25 divide by 5 both sides
2x+3=5 substract 3 both sides]
2x=2 divide by 2
x=1
5 (a+3) = 4 (7+a) do ditribution property both sides
5a+15=28+ 4a substract 15 both sides and substract 4a also both sides
a=13


hope i help

Qu 1
3a = 2
a = 2/3

Qu 2
52x = - 28
x = - 7/13

Qu 3
t = 0

Qu 4
p - 4 = - 7
p = - 3

Qu 5
2x + 3 = 5
x = 1

Qu 6
5a + 15 = 28 + 4a
a = 13

6a-13=9a-15
-3a=-2
a=2/3

32x+18=-20x-10
52x=-28
x=-7/13

4t+7=7t+7
-3t=0
t=0

-3p+12=21
-3p=9
p=-3

10x+15=25
10x=5
x=1/2

5a+15=28+4a
a=13

are you trying to find out what the pro-numerals mean?
is so then:

6a-13=9a-15

you are trying to get the "a" by itself on one side of the equation so:

6a-13=9a-15
-6a -6a (what ever you do to one side u must do to the other)
-13=3a-15
-15 -15
-28=3a
(divide both sides by 3)
a=-9 1/3

hop this helped so then you will be able to do the others..hopefully

6a - 13 = 9a - 15
2 = 3a (take away 6a and add 13 to both sides)
a = 2/3

32x + 18 = -20x - 10
52x = -28 (add 20x and subtracted 18 from both sides)
x = -7/13

4t + 7 = 7t + 7
3t = 0 (subtract 4t and 7 from both sides)

-3 (p-4) = 21
p-4 = -7 (divide both sides by -3)
p = -3 (add 4 to both sides)

5 (2x+3) = 25
2x + 3 = 5 (divide both sides by 5)
2x = 2 (subtract 3 on both sides)
x = 1 (divide both sides by 1)

5 (a+3) = 4 (7+a)
5a + 15 = 28 + 4a (expand both sides)
a = 13 (subtract 4a and 13 from both sides)