Răspuns :
Răspuns:
a.7,5
b.4
c.6
e.8
f.4
g.4
k.8
l.4
m.1
n.3
Explicație pas cu pas:
a.2x-5=10
2x=10+5
2x=15
x=15 supra 2
x=7,5
b.3x-12=0
3x=12+0
3x=12
x=12:3
x=4
c.7x-42=0
7x=42+0
7x=42
x=42:7
x=6
e.8x-64=0
8x=64+0
8x=64
x=64:8
x=8
f.4x-16=0
4x=16+0
4x=16
x=16:4
x=4
g.5x-20=0
5x=20+0
5x=20
x=20:5
x=4
k.2x-4=12
2x=12+4
2x=16
x=16:2
x=8
l.4x-12=4
4x=4+12
4x=16
x=16:4
x=4
m.11x-1=10
11x=10+1
11x=11
x=11:11
x=1
n.12x-24=12
12x=36
x=36:12
x=3