Question

b) 150 - 7x b = 87
c) (239-C +29): 8 = 7
d) a - 387 x 6 = 3 000 - 45:3

Answer 1

Explicație pas cu pas:

b) 150-7b=87

-7b=87-150

-7b=-63

7b=63

b=$\frac{63}{7\\}$

b=9

c) $\frac{239-c+29}{8}$=7

239-c+27=7·8

239-c+27=56

239-c=56-27

239-c=29

-c=29-239

-c=-210

c=210

d) a-387·6=3000-$\frac{45}{3}$

a-2322=3000-15

a-2322=2985

a=2985+2322=5307