Question

(a + 6 x 2 +9 x 5)-2×(17-7) = 2×5+6×5




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Answer 1

Răspuns:

(a+6x2+9X5)-2X(17-7)=2X5+6X5

(a+12+45)-2x10=10+30

(a+12+45)-20=40

(a+12+45)=40+20

(a+12+45)=60

(a+12)=60-45

a+12=15

a=15-12

a=3