7x+15-3x=12+(7*2+4*4)*2

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Solution for 7x+15-3x=12+(7*2+4*4)*2 equation: 


Simplifying
7x + 15 + -3x = 12 + (7 * 2 + 4 * 4) * 2

Reorder the terms:
15 + 7x + -3x = 12 + (7 * 2 + 4 * 4) * 2

Combine like terms: 7x + -3x = 4x
15 + 4x = 12 + (7 * 2 + 4 * 4) * 2

Multiply 7 * 2
15 + 4x = 12 + (14 + 4 * 4) * 2

Multiply 4 * 4
15 + 4x = 12 + (14 + 16) * 2

Combine like terms: 14 + 16 = 30
15 + 4x = 12 + (30) * 2

Multiply 30 * 2
15 + 4x = 12 + 60

Combine like terms: 12 + 60 = 72
15 + 4x = 72

Solving
15 + 4x = 72

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + 4x = 72 + -15

Combine like terms: 15 + -15 = 0
0 + 4x = 72 + -15
4x = 72 + -15

Combine like terms: 72 + -15 = 57
4x = 57

Divide each side by '4'.
x = 14.25

Simplifying
x = 14.25

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