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3 years ago

5a-z=8 -2a+5z =-6 What is the answer

Mathematics

1 answer:

timurjin [86]3 years ago

8 0

Answer:

122 = 7(z + 8) + -5(6 + z) >z = 48

Step-by-step explanation:

122 = 7(8 + z) + -5(6 + z)

122 = (8 * 7 + z * 7) + -5(6 + z)

122 = (56 + 7z) + -5(6 + z)

122 = 56 + 7z + (6 * -5 + z * -5)

122 = 56 + 7z + (-30 + -5z)

Reorder the terms:

122 = 56 + -30 + 7z + -5z

Combine like terms: 56 + -30 = 26

122 = 26 + 7z + -5z

Combine like terms: 7z + -5z = 2z

122 = 26 + 2z

Solving

122 = 26 + 2z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '-2z' to each side of the equation.

122 + -2z = 26 + 2z + -2z

Combine like terms: 2z + -2z = 0

122 + -2z = 26 + 0

122 + -2z = 26

Add '-122' to each side of the equation.

122 + -122 + -2z = 26 + -122

Combine like terms: 122 + -122 = 0

0 + -2z = 26 + -122

-2z = 26 + -122

Combine like terms: 26 + -122 = -96

-2z = -96

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