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c)x-2a+10b+17=4

d)47-x+7a-35b=2a-10b+4 ​

Răspuns :

Emilyhouley

c) a- 5b = 7

x - 2a +10b +17 = 4

x - 2(a +5b) +17 = 4

x - 2×7+17 = 4

x - 14+17 = 4

x + 3 = 4

x = 4 - 3 = 1

d)47-X +7(A-5B)=2(A-5B)+4

47-X+49=14+4

47-X+49=18

X=96-18

X=78