簡易方程式~

Answer:
1.) 2a+1=6
..2a+1-1=6-1
.........2a=5
......2a/2=5/2
..........a=2.5

2.) 4y／3=2
..4y/3 X 3=2X3
..........4y=6
........4y/4=6/4
............y=1.5

3.) .a(1-80﹪)=0.1
........a(1-0.8)=0.1
...........a(0.2)=0.1
.....a(0.2)/0.2=0.1/0.2
.................a=0.5

4.) 50﹪×b-3=4-2
.......0.5xb-3=2
.........0.5b-3=2
.....0.5b-3+3=2+3
............0.5b=5
......0.5b/0.5=5/0.5
................b=10

希望可以幫到你。

(你不用理會那些點點)

1.
2a+1 = 6
2a = 6-1
2a = 5
a = 5/2

2.
4y/3 = 2
4y = 2x3
4y = 6
y = 6/4
y = 3/2

3.
a(1-80%) = 0.1
a(20%) = 0.1
a = 0.1/(20%)
a = 0.5

4.
50% x b - 3 = 4-2
50% x b - 3 = 2
50% x b = 2+ 3
50% x b = 5
b = 5 / 50%
b = 10

1) 2a+1=6 2) 4y／3=2 3)a(1-80﹪)=0.1
2a+1-1 =6-1 4y/3x3/4=2x3/4 20%a=0.1 2a=5 y=1.5 20/100x100/20a=0.1x20/100
2a/2=5/2 a=1/10x1/5
a=2.5 a=1/50


4) 50﹪×b-3=4-2
50/100xb-3=2
50/100x100/50b-3=2x100/50
b-3=4
b-3+3=4+3
b=7

1) 2a+1=6
2a+1-1=6-1
2a/2=5/2
a=2 1/2

2) 4y/3 x 3=2x3
4y//4=6/4
y=1 1/2

3) 20a/100=0.1
20a/100 x100 =0.1x100
20a/20=10/20
a=1/2

4) 50b/100-3+3=4-2+3
50b/100 x100 =5 x100
50b/50 = 500/50
b=10

1.
2a+1 = 6
2a = 6-1
2a = 5
a = 5/2

2.
4y/3 = 2
4y = 2x3
4y = 6
y = 6/4
y = 3/2

3.
a(1-80%) = 0.1
a(20%) = 0.1
a = 0.1/(20%)
a = 0.5

4.
50% x b - 3 = 4-2
50% x b - 3 = 2
50% x b = 2+ 3
50% x b = 5
b = 5 / 50%
b = 10