48-r=40

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Solution for 48-r=40 equation:


Simplifying
48 + -1r = 40

Solving
48 + -1r = 40

Solving for variable 'r'.

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

Add '-48' to each side of the equation.
48 + -48 + -1r = 40 + -48

Combine like terms: 48 + -48 = 0
0 + -1r = 40 + -48
-1r = 40 + -48

Combine like terms: 40 + -48 = -8
-1r = -8

Divide each side by '-1'.
r = 8

Simplifying
r = 8

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