9-8r=4-7r

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Solution for 9-8r=4-7r equation:


Simplifying
9 + -8r = 4 + -7r

Solving
9 + -8r = 4 + -7r

Solving for variable 'r'.

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

Add '7r' to each side of the equation.
9 + -8r + 7r = 4 + -7r + 7r

Combine like terms: -8r + 7r = -1r
9 + -1r = 4 + -7r + 7r

Combine like terms: -7r + 7r = 0
9 + -1r = 4 + 0
9 + -1r = 4

Add '-9' to each side of the equation.
9 + -9 + -1r = 4 + -9

Combine like terms: 9 + -9 = 0
0 + -1r = 4 + -9
-1r = 4 + -9

Combine like terms: 4 + -9 = -5
-1r = -5

Divide each side by '-1'.
r = 5

Simplifying
r = 5

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