Question

Observa schema si transcrie rezolvarea printr-un exerciţiu.


Va rog e urgent, dau coroana!!!
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Answer 1

$x \times 3 - 42 + 86 = 143 \\ x \times 3 - 42 = 143 - 86 \\ x \times 3 - 42 = 57 \\ x \times 3 = 57 + 42 \\ x \times 3 = 99 \\ x = 99 \div 3 \\ x = 33$