Question

Rezolva exercitiile:
A. -7(×-3)= -14
B. 2(2×-3)= -10
C.3(2×-3)= -39
D.2(×-8)+4= -6
E.-5 (×-3)+7=2
F.-6 (×+7)+3×= -42

Urgent va rog!!!
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Answer 1

Răspuns:

a) x-3=2=x=2+3=5

b) 2x-3=-5=2x=-5+3=2x=-2=x-1

c) -39=2x-3=-13=2x=-13+3=2x=-10=x=-5

d) 2x-16-4=-6=2x-20=-6

2x=-6+20

2x=14

x=14:2

x=7