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4x - 6 = 2x + 4
4x - 2x = 4 + 6
2x = 10 | :2
x=5
2) 5*(x+2) = 30
5x + 10 = 30
5x = 30 -10
5x = 20 | :5
x= 4
4x-6 = 2x+ 4
4x-2x = 4+6
2x=10 /2
x=5
Odp. Równanie spełnia liczba 5.
5(x+2)=30
5x+10=30
5x=30-10
5x=20/5
x=4
Odp. Równanie spełnia liczba 4