Răspuns:
Explicație pas cu pas:
a)
5x - 10 = 45
5x = 45 + 10 = 55
x = 55 : 5 = 11
b)
3x + 3 - 5 = x + 6
3x - 2 = x + 6
3x - x = 6 + 2
2x = 8
x = 8: 2 = 4
c)
4x + 3x + 3 = 2x - 2
7x + 3 = 2x - 2
7x - 2x = -2 - 3
5x = -5
x = -5 : 5 = -1
a) 5(x-2)=45
5x-10=45
5x=45+10
5x=55
x=11
b) 3(x+1)-5=x+6
3x+3-5=x+6
3x+3-5-x+6=0
2x+4=0
2x=-4
x=-2
c) 4x+3(x+1)=2(x-1)
4x+3x+3=2x-2
4x+3x+3-2x+2=0
5x+5=0
5x=-5
x=-1
