3x-7(4x+21)=103

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Solution for 3x-7(4x+21)=103 equation:


Simplifying
3x + -7(4x + 21) = 103

Reorder the terms:
3x + -7(21 + 4x) = 103
3x + (21 * -7 + 4x * -7) = 103
3x + (-147 + -28x) = 103

Reorder the terms:
-147 + 3x + -28x = 103

Combine like terms: 3x + -28x = -25x
-147 + -25x = 103

Solving
-147 + -25x = 103

Solving for variable 'x'.

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

Add '147' to each side of the equation.
-147 + 147 + -25x = 103 + 147

Combine like terms: -147 + 147 = 0
0 + -25x = 103 + 147
-25x = 103 + 147

Combine like terms: 103 + 147 = 250
-25x = 250

Divide each side by '-25'.
x = -10

Simplifying
x = -10

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