7*9=(7*10)-(8*x)

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Solution for 7*9=(7*10)-(8*x) equation:


Simplifying
7 * 9 = (7 * 10) + -1(8x)

Multiply 7 * 9
63 = (7 * 10) + -1(8x)

Multiply 7 * 10
63 = (70) + -1(8x)
63 = 70 + -1(8x)

Remove parenthesis around (8x)
63 = 70 + -1 * 8x

Multiply -1 * 8
63 = 70 + -8x

Solving
63 = 70 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
63 + 8x = 70 + -8x + 8x

Combine like terms: -8x + 8x = 0
63 + 8x = 70 + 0
63 + 8x = 70

Add '-63' to each side of the equation.
63 + -63 + 8x = 70 + -63

Combine like terms: 63 + -63 = 0
0 + 8x = 70 + -63
8x = 70 + -63

Combine like terms: 70 + -63 = 7
8x = 7

Divide each side by '8'.
x = 0.875

Simplifying
x = 0.875

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