a) 5x + 4 = 10
b) -2x + 3 =7
c) – 4x + 5 = 25 – 9x
d) 2( x + 4) + 6x = 8
e) -4 + 4(2 – 5x) = -9
f) – 1,5x – 3 = 0,2x + 6
g) = -2
h) - = x + 5



Odpowiedź :

A/. 5x+4=10. 5x=10-4. 5x=6/:5. X=1,1/5

B/. - 2x+3=7. - 2x=7-3. - 2x=4/:-2. X=-2

C/ - 4x+5=25-9x. - 4x+9x=25-5. 5x=20

X=4

D/. 2(x+4)+6x=8. 2x+8+6x=8. 2x+6x=8+8. 8x=16/:8. X=2

E/. - 4+4(2-5x)=-9. - 4+8-20x=-9

-20x=-9+4-8. - 20x=-13/:-20. X=65/100

F/. - 1,5x-3=0,2x+6. - 1,5x-0,2x=6+3

-1,7x=9/*-10. 17x=-90/:17. X=5,29/100

H/. - =x+5. - x=5/*-1. X=-5