21X+18=25X-7

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Solution for 21X+18=25X-7 equation:


Simplifying
21X + 18 = 25X + -7

Reorder the terms:
18 + 21X = 25X + -7

Reorder the terms:
18 + 21X = -7 + 25X

Solving
18 + 21X = -7 + 25X

Solving for variable 'X'.

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

Add '-25X' to each side of the equation.
18 + 21X + -25X = -7 + 25X + -25X

Combine like terms: 21X + -25X = -4X
18 + -4X = -7 + 25X + -25X

Combine like terms: 25X + -25X = 0
18 + -4X = -7 + 0
18 + -4X = -7

Add '-18' to each side of the equation.
18 + -18 + -4X = -7 + -18

Combine like terms: 18 + -18 = 0
0 + -4X = -7 + -18
-4X = -7 + -18

Combine like terms: -7 + -18 = -25
-4X = -25

Divide each side by '-4'.
X = 6.25

Simplifying
X = 6.25

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