( – 70 – (-10)) : r x 12 = – 72, maka nilai r adalah ….A. -12B. -10 C. 12D. 10​

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( – 70 – (-10)) : r x 12 = – 72, maka nilai r adalah ….A. -12B. -10 C. 12D. 10​

Jawaban:

( - 70 – (-10)) : r times 12 = - 72 \ (- 70 + 10) div r times 12 = - 72 \ - 60 div r times 12 = - 72 \ - 60 div r = frac{ - 72}{12} \ - 60 div r = - 6 \ \ - 60 div - 6 = r \ r = 10