Question

Afla numerele necunoscute din expresiile de mai jos.

a. (x+20):12+68=78

b. (x+282-75):2=104

c. x×4:10+10+101=133

Va rog ajutati-ma

Answer 1

(x+20):12+68=78
x+20:12+68=78
x+20:12=78-68
x+20:12=10
x+20=10x12
x+20=120
x=120-20
x=100


(x+282-75):2=104
x+282-75=104•2
x+282-75=208
x+282=208+75
x+282=283
x=283-282
x=1

x•4:10+10+101=133
x•4:10+10=133-101
x•4:10+10=32
x•4:10=32-10
x•4:10=22
x•4=22•10
x•4=220
x=220:4
x=55