Odpowiedź :
g) 7x + 2 = 5 + 3x + 9
7x + 2 = 14 + 3x
7x - 3x = 14 - 2
4x = 12 /:4
x = 3
f) -3 + 2x - 6 = 3 - 4x
-9 + 2x = 3 - 4x
2x + 4x = 3 + 9
6x = 12 /:6
x = 2
h) -5x + 12 + x = 2x - 12
-4x + 12 = 2x - 12
-4x - 2x = -12 - 12
-6x = -24 /:(-6)
x = 4
b) 3(x-4) - 2(2x - 5) = -4
3x - 12 - 4x + 10 = -4
-x - 2 = -4
-x = -4 + 2
-x = -2
x = 2
c) 2(x+4) - 5(x+3) = 2
2x + 8 - 5x - 15 = 2
-3x - 7 = 2
-3x = 2 + 7
-3x = 9 /:(-3)
x = -3
d) -2(x+3) + 4(2x+3) = -6
-2x - 6 + 8x + 12 = -6
-2x + 8x + 12 = 0
6x + 12 = 0
6x = -12 /:(-6)
x = -2
[tex]Zad. 1\\f) \\-3+2x-6=3-4x \\2x+4x=3+3+6\\6x=12 /:6\\x=2\\\\g) \\7x+2=5+3x+9\\7x-3x=5+9-2\\4x=12 /:4\\x=3\\\\h) \\-5x+12+x=2x-12\\-5x+x-2x=-12-12\\-6x=-24 /:(-6)\\x=4[/tex]
[tex]Zad. 2\\b)\\3(x-4)-2(2x-5)=-4\\3x-12-4x+10=-4\\3x-4x=-4+12-10\\-x=8-10\\-x=-2 /*(-1)\\x=2\\\\c)\\2(x+4)-5(x+3)=2\\2x+8-5x-15=2\\2x-5x=2-8+15\\-3x=-6+15\\-3x=9 /:(-3)\\x=-3\\\\d)\\-2(x+3)+4(2x+3)=-6\\-2x-6+8x+12=-6\\-2x+8x=-6+6-12\\6x=-12/:6\\x=-2[/tex]