Explicație pas cu pas:
9(x - 2) = -63
9x - 9×2 = -63
9x - 18 = -63
9x = -63 + 18
9x = - 45
x = -45 : 9
x = -5
5(x+3) = 2(5x-5)
5x + 5×3 = 2×5x - 2×5
5x + 15 = 10x - 10
5x - 10x = -10 -15
-5x = -25 /×(-1)
5x = 25
x = 25 : 5
x = 5
2(4x+1) = 2(5x-7)
2×4x + 2×1 = 2×5x - 2×7
8x + 2 = 10x - 14
8x - 10x = -14 -2
-2x = - 16 /×(-1)
2x=16
x=16:2
x=8
2(x+1) = 6
2x + 2×1 = 6
2x + 2 = 6
2x = 6-2
2x = 4
x= 4:2
x=2
5(x-1) = 2x+7
5x- 5×1 = 2x + 7
5x - 5 = 2x+7
5x - 2x = 7+5
3x = 12
x = 12 : 3
x = 4
3(x+2) = 2(x+4)
3x + 3×2 = 2x + 2×4
3x + 6 = 2x + 8
3x - 2x = 8 - 6
x = 2
x : (-3) = -12
x = -12 × (-3)
x = 36
5(x-8) = 4x - 39
5x - 5×8 = 4x-39
5x-40 = 4x-39
5x-4x = -39 + 40
x = 1
-4+3(x+5) = 10
-4+ 3x + 3×5 = 10
-4 + 3x + 15 = 10
3x = 10 +4 -15
3x = 14-15
3x = -1 =) x nu aparține mulțimii Z
2(x-1) = 3(x+4)
2x - 2×1 = 3x + 3×4
2x - 2 = 3x + 12
2x - 3x = 12 + 2
-x = 14 / ×(-1)
x = - 14
Succes
