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

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


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

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

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

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

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

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

Solving
80 + 20X = 90

Solving for variable 'X'.

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

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

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

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

Divide each side by '20'.
X = 0.5

Simplifying
X = 0.5

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