7-9x=100-30x

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Solution for 7-9x=100-30x equation:


Simplifying
7 + -9x = 100 + -30x

Solving
7 + -9x = 100 + -30x

Solving for variable 'x'.

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

Add '30x' to each side of the equation.
7 + -9x + 30x = 100 + -30x + 30x

Combine like terms: -9x + 30x = 21x
7 + 21x = 100 + -30x + 30x

Combine like terms: -30x + 30x = 0
7 + 21x = 100 + 0
7 + 21x = 100

Add '-7' to each side of the equation.
7 + -7 + 21x = 100 + -7

Combine like terms: 7 + -7 = 0
0 + 21x = 100 + -7
21x = 100 + -7

Combine like terms: 100 + -7 = 93
21x = 93

Divide each side by '21'.
x = 4.428571429

Simplifying
x = 4.428571429

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