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

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


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

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

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

Remove parenthesis around (7x)
63 = 70 + -1 * 7x

Multiply -1 * 7
63 = 70 + -7x

Solving
63 = 70 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
63 + 7x = 70 + -7x + 7x

Combine like terms: -7x + 7x = 0
63 + 7x = 70 + 0
63 + 7x = 70

Add '-63' to each side of the equation.
63 + -63 + 7x = 70 + -63

Combine like terms: 63 + -63 = 0
0 + 7x = 70 + -63
7x = 70 + -63

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

Divide each side by '7'.
x = 1

Simplifying
x = 1

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