Explicație pas cu pas:
a 14x-5=9
14×=9+5
14×=14
×=14÷14
×=1
faci in acelasi mod la toate pana la (i
j 2(x-1)=4 k) (-5)x-(-8)=8 m)3x+1-x=5
2x-2=4 -5×+8=8 2x+1=5
2x=4+2 -5×=8-8 2x=5-1
2x=6 -5x=0 2x=4
x=6÷2 x=0÷(-5) x=4÷2=2
x=3 x=0
p (x+1)+(x+2)+(x+3)+(x+4)=1+2+3+4
x+1+x+2+x+3+x+4=10
4x+10=10
4×=10-10
4×=0
×=0÷4=0
r 5x-3=4x s)-2x+1=2×-1
5x-4×=3 -2×-2×=-1-1
x=3 -4×=0
x=0
