Do the addition on a calculator, then see whether it is, or isn't, equal.
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Yes because if 1+0=1 than 0 plus b equals b
472 − 150 = 322Therefore, 472 is the answer.
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x = y = 0 ?
1 plus 1 plus 1 plus 1 equals 1 times 4. 1 times 4 equals 4. 4 minus 4 equals 0. 0