8(5z+7)-4(5z-6)=90

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Solution for 8(5z+7)-4(5z-6)=90 equation:


Simplifying
8(5z + 7) + -4(5z + -6) = 90

Reorder the terms:
8(7 + 5z) + -4(5z + -6) = 90
(7 * 8 + 5z * 8) + -4(5z + -6) = 90
(56 + 40z) + -4(5z + -6) = 90

Reorder the terms:
56 + 40z + -4(-6 + 5z) = 90
56 + 40z + (-6 * -4 + 5z * -4) = 90
56 + 40z + (24 + -20z) = 90

Reorder the terms:
56 + 24 + 40z + -20z = 90

Combine like terms: 56 + 24 = 80
80 + 40z + -20z = 90

Combine like terms: 40z + -20z = 20z
80 + 20z = 90

Solving
80 + 20z = 90

Solving for variable 'z'.

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

Add '-80' to each side of the equation.
80 + -80 + 20z = 90 + -80

Combine like terms: 80 + -80 = 0
0 + 20z = 90 + -80
20z = 90 + -80

Combine like terms: 90 + -80 = 10
20z = 10

Divide each side by '20'.
z = 0.5

Simplifying
z = 0.5

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