45-1.50r=21

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Solution for 45-1.50r=21 equation: 



45-1.50r=21

We move all terms to the left:

45-1.50r-(21)=0

We add all the numbers together, and all the variables

-1.5r+24=0

We move all terms containing r to the left, all other terms to the right

-1.5r=-24

r=-24/-1.5

r=+16

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