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Rozwiąż równanie:
4x = 15
2x + 12 = 10
x + 4 = 2x – 5
4(2x +1) = 20
2(5x – 3) = 5(x - 4) + 2x


Odpowiedź :

4x = 15, x= [tex]\frac{15}{4}[/tex], x=3[tex]\frac{3}{4}[/tex]

2x + 12 = 10, 2x= -2, x= -1

x + 4 = 2x – 5, -x=-9, x=9

4(2x +1) = 20, 8x+4= 20, 8x=16, x=2

2(5x – 3) = 5(x - 4) + 2x,

10x-6=5x-20+2x

3x=-26

x= -8[tex]\frac{2}{3}[/tex]