3r+8=40-r

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Solution for 3r+8=40-r equation:



3r+8=40-r
We move all terms to the left:
3r+8-(40-r)=0
We add all the numbers together, and all the variables
3r-(-1r+40)+8=0
We get rid of parentheses
3r+1r-40+8=0
We add all the numbers together, and all the variables
4r-32=0
We move all terms containing r to the left, all other terms to the right
4r=32
r=32/4
r=8

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