Solve for x
x=560
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645+640+675+x=630\times 4
Multiply both sides by 4.
1285+675+x=630\times 4
Add 645 and 640 to get 1285.
1960+x=630\times 4
Add 1285 and 675 to get 1960.
1960+x=2520
Multiply 630 and 4 to get 2520.
x=2520-1960
Subtract 1960 from both sides.
x=560
Subtract 1960 from 2520 to get 560.
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