Question

afla numarul necunoscut a) (×+16):8=7 (×+36):9=8 b) ×-(26+37):7=45 29-(63+×):9=0 c) (×+9):6=5 (19+×):6=8

Answer 1

a) (x+16):8=7
(x+16)=7×8
(x+16)=56
x=56-16
x=40

(x+36):9=8
(x+36)=8×9
(x+36)=72
x=72-36
x=36

b) x-(26+37):7=45
x-63:7=45
x-9=45
x=45+9
x=54

29-(63+x):9=0
(63+x):9=29-0
(63+x):9=29
(63+x)=29×9
(63+x)=261
x=261-63
x=198

c) (x+9):6=5
(x+9)=5×6
(x+9)=30
x=30-9
x=22

(19+x):6=8
(19+x)=8×6
(19+x)=48
x=48-19
x=29