0.1(x+60)+0.7(x-90)=7

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Solution for 0.1(x+60)+0.7(x-90)=7 equation:


Simplifying
0.1(x + 60) + 0.7(x + -90) = 7

Reorder the terms:
0.1(60 + x) + 0.7(x + -90) = 7
(60 * 0.1 + x * 0.1) + 0.7(x + -90) = 7
(6 + 0.1x) + 0.7(x + -90) = 7

Reorder the terms:
6 + 0.1x + 0.7(-90 + x) = 7
6 + 0.1x + (-90 * 0.7 + x * 0.7) = 7
6 + 0.1x + (-63 + 0.7x) = 7

Reorder the terms:
6 + -63 + 0.1x + 0.7x = 7

Combine like terms: 6 + -63 = -57
-57 + 0.1x + 0.7x = 7

Combine like terms: 0.1x + 0.7x = 0.8x
-57 + 0.8x = 7

Solving
-57 + 0.8x = 7

Solving for variable 'x'.

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

Add '57' to each side of the equation.
-57 + 57 + 0.8x = 7 + 57

Combine like terms: -57 + 57 = 0
0 + 0.8x = 7 + 57
0.8x = 7 + 57

Combine like terms: 7 + 57 = 64
0.8x = 64

Divide each side by '0.8'.
x = 80

Simplifying
x = 80

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