R+4+5=7

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Solution for R+4+5=7 equation: 


Simplifying
R + 4 + 5 = 7

Reorder the terms:
4 + 5 + R = 7

Combine like terms: 4 + 5 = 9
9 + R = 7

Solving
9 + R = 7

Solving for variable 'R'.

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

Add '-9' to each side of the equation.
9 + -9 + R = 7 + -9

Combine like terms: 9 + -9 = 0
0 + R = 7 + -9
R = 7 + -9

Combine like terms: 7 + -9 = -2
R = -2

Simplifying
R = -2

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