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Gnesinka [82]
3 years ago
15

Use the drop-down menus to choose steps in order to correctly solve 5(z + 6) – 2 = 9z for z.

Mathematics
2 answers:
shusha [124]3 years ago
5 0
Solve for z:
5 (z + 6) - 2 = 9 z

5 (z + 6) = 5 z + 30:
5 z + 30 - 2 = 9 z

Add like terms. 30 - 2 = 28:
5 z + 28 = 9 z

Subtract 9 z from both sides:
(5 z - 9 z) + 28 = 9 z - 9 z

5 z - 9 z = -4 z:
-4 z + 28 = 9 z - 9 z

9 z - 9 z = 0:
28 - 4 z = 0

Subtract 28 from both sides:
(28 - 28) - 4 z = -28

28 - 28 = 0:
-4 z = -28

Divide both sides of -4 z = -28 by -4:
(-4 z)/(-4) = (-28)/(-4)

(-4)/(-4) = 1:
z = (-28)/(-4)

The gcd of 28 and -4 is 4, so (-28)/(-4) = (-(4×7))/(4 (-1)) = 4/4×(-7)/(-1) = (-7)/(-1):
z = (-7)/(-1)

(-7)/(-1) = (-1)/(-1)×7 = 7:
Answer:  z = 7
sdas [7]3 years ago
5 0

Answer:

Drop Down 1: 5z+28=9z

DD #2: 28=4z

DD #3: 7=z

Step-by-step explanation:

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4 0
4 years ago
Find the slope of the line.
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7 0
3 years ago
What is the value of y in the solution to the system of equations?
FinnZ [79.3K]
You can either multiply both equation by -2 or multiply both equations by 3 because when you multiply -2 you can eliminate x term
1. -2(x) -2(y) = -2(1) -> -2x -2y=-2

So far
-2x-2y=-2
+
2x-3y= -30

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X+ 32/5= 1
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I don’t know why my answer doesn’t match with those answers above. I also checked by calculator. Did you write the question wrong?


6 0
3 years ago
Can someone please give me the (Answers) to this? ... please ...<br><br> I need help….
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above is the answer to the question

6 0
2 years ago
Read 2 more answers
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