Please help me. Math homework.?

From the given equation - 2z + 9 = 3, you can find that
z equals 3.

Given - 2z + 9 = 3, solve for z

Subtract 9 from both sides
- 2z = - 6

Divide both sides by - 2
z = 3

Now you can replace z with 3 in the expression
5z - 5 and evaluate it
5 ( 3 ) - 5
15 - 5
10

solve the equation for z

-2z + 9 = 3

subtract 9 from both sides

-2z = 3 - 9

-2z = -6

divide by -2

z = -6/-2

z = +3

now substitute into expression

5z - 5
5 (3) - 5
15 - 5
10

Try taking 9 off both sides of the 2nd equation

solve for "z" in -2+9=3 first. Once you get the answer, plug in the value from -2z+9=3 to the "z" in 5z-5

Lol, is the answer in the back of the book? My GUESS is that you would solve the -2z+9=3 first and put that result into the other statement.

-2z + 9 = 3
-2z = = 3 - 9
z = -6/(-2)
z = 3

5z - 5

Substitute 3 for z.
= 5(3) - 5
= 15 - 5
= 10

-2z+9=3
-2z=3-9=-6
z=3
5(3)-5=10
GOOD LUCK.

your objective is to get z alone on a side by itself. subtract 9 from each side. this is to eliminate the +9. you must get rid of it by doing opposite of sign, it is positive so you subtract which is negative.

so -2z+9=3
-9 -9
-2z=-6

then you divide each side by negative two. this is to get rid of negative two. and that says -2 TIMES z. when they are right next to each other they are multiplication. division undos multiplication so...

-2(÷ -2) z = -6(÷ -2)
that equals z=3
FINAL ANSWER IS z=3

z= 3, this is the procedure
-2z+9=3
-2z=3-9
-2z=-6
-2z/-2= -6/-2
z=3

-2z+9=3
-9 -9
-2z=-6
/-2 /-2
z=3

5z-5=5*(3)-5=10