Explicație pas cu pas:
A) x=33-19
X=14
B)2x=27-13
2x=14
X=14:2
X=7
C)3x-x=46
2x=46
X=46:2
X=13
D)7+13=2x-x
20=x
E)x-3=8*5
X-3=40
X=40+3
X=43
F)x-12=120:6
X-12=20
X=20+12
X=32
G)9*3+9x=63
27+9x=63
9x=63-27
9x=36
X=36:9
X=4
H)2x+10+3x=75
5x+10=75
5x=75-10
5x=65
5x=65:5
X=13
I)3x+3+2x-2=56
5x+1=56
5x=56-1
5x=55
X=55:5
X=11