4 (x - 2) = 2x+6 Sprawdzenie:
4x - 8 = 2x + 6 4 (x - 2) = 2x+6
4x - 2x = 6 + 8 4(7-2) = 2*7 + 6
2x = 14 /:2 4*5 = 14 + 6
x = 7 20 = 20
5x-1=4(x+3) Sprawdzenie:
5x - 1 = 4x + 12 5x-1=4(x+3)
5x - 4x = 12 + 1 5*13 - 1 = 4(13+3)
x = 13 65 - 1 = 4*16
64 = 64
2m-4=6m+8 Sprawdzenie:
2m - 6m = 8 +4 2m-4=6m+8
-4m = 12 /:(-4) 2*(-3) -4 = 6*(-3) + 8
m = -3 -6 - 4 = -18 + 8
-10 = -10