Odpowiedź:
Szczegółowe wyjaśnienie:
a) 2x + 5 = 17/ -5
2x = 12/:2
x = 6
b) 3x - 4 = x + 9/ -x
2x - 4 = 9/+4
2x = 13/:2
x = 6,5
c) 2(x+5) = x-41
2x + 10 = x-41/-x
x + 10 = -41/-10
x = -51
d) -3 = x+5/-5
-8 = x
f) -(4+x) = 2(3-x)
4-x = 6-2x/+2x
4+x = 6/-4
x = 2