4(21)=7(x-3)

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


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

Multiply 4 * 21
84 = 7(x + -3)

Reorder the terms:
84 = 7(-3 + x)
84 = (-3 * 7 + x * 7)
84 = (-21 + 7x)

Solving
84 = -21 + 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.
84 + -7x = -21 + 7x + -7x

Combine like terms: 7x + -7x = 0
84 + -7x = -21 + 0
84 + -7x = -21

Add '-84' to each side of the equation.
84 + -84 + -7x = -21 + -84

Combine like terms: 84 + -84 = 0
0 + -7x = -21 + -84
-7x = -21 + -84

Combine like terms: -21 + -84 = -105
-7x = -105

Divide each side by '-7'.
x = 15

Simplifying
x = 15

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