a) 5x+2=3x-7
5x-3x=-7-2
2x=-9
x=-9/2
b) 2(5x-4)=7(2x-3)
10x-8=14x-21
10x-14x=-21+8
-4x=-13 |*(-1)
4x=13
x=13/4
Răspuns:
Explicație pas cu pas:
a)
5x + 2 = 3x - 7
5x - 3x = -7 - 2
2x = -9
x = -9/2
b)
10x - 8 = 14x - 21
14x - 10x = 21 - 8
4x = 13
x = 13/4