Zad.1.Rozwiaz równania a.-5x+12+x=2x-12 b.6(4-x)+5(2x-5)=4(x-1)-3(4-x) c.2(x+4)-5(x+3)=2 d.x+3-(4-x)=3x-(2x-3) Zad.2.Rozwiaz równania a.(3-2x)-(x+4)-(2x+5)=(3x-4)-(5x+7) b.(4-x)-(2x+3)+(x-4)=-(2x-3)-(x+7) c.(4x-5)+(x-7)-(2x-8)=(-3x+4)-(x-6) d.-(4-2x)-(2x+4)=(3x-1)+(2x-5)-(7-3x) e.3(x-4)-4(2x-7)=2(x+5) f.2(2x-3)+3(4-x)=-(x+1) g.2(x-3)-4(3+x)=-3(x+2)+2(2x-1)
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a.) -5x+12+x=2x-12
-5x - 2x + x = - 12 - 12
-6x = -24 /: (-6)
x = 4
b.) 6(4-x)+5(2x-5)=4(x-1)-3(4-x)
24 - 6x + 10x - 25 = 4x - 4 - 12 + 3x
-6x + 10x - 4x - 3x = -4 - 12 + 25 - 24
-3x = -15 /: (-3)
x = 5
c.) 2(x+4)-5(x+3)=2
2x + 8 - 5x - 15 = 2
2x - 5x = 2 + 15 - 8
-3x = 11 /: (-3)
x = - 3 i 2/3
d.) x+3-(4-x)=3x-(2x-3)
x + 3 - 4 + x = 3x - 2x + 3
x + x - 3x + 2x = 3 + 4 - 3
x = 4
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a.) (3-2x)-(x+4)-(2x+5)=(3x-4)-(5x+7)
3 - 2x - x - 4 - 2x - 5 = 3x - 4 - 5x - 7
-2x - x - 2x - 3x + 5x = -7 - 4 + 5 + 4 - 3
-8x = -5 /: (-8)
x = 5/8
b.(4-x)-(2x+3)+(x-4)=-(2x-3)-(x+7)
4 - x - 2x - 3 + x - 4 = -2x + 3 - x - 7
-x - 2x + x + 2x - x = -7 + 3 + 4 + 3 - 4
-x = -1 /: (-1)
x = 1
c.) (4x-5)+(x-7)-(2x-8)=(-3x+4)-(x-6)
4x - 5 + x - 7 - 2x + 8 = - 3x + 4 - x + 6
4x + x - 2x + 3x + x = 6 + 4 - 8 + 7 + 5
6x = 14 /: 6
x = 2 i 1/3
d.) -(4-2x)-(2x+4)=(3x-1)+(2x-5)-(7-3x)
-4 + 2x - 2x - 4 = 3x - 1 + 2x -5 - 7 + 3x
2x - 2x - 3x - 2x - 3x = -7 - 5 - 1 + 4 + 4
-8x = -5 /: (-8)
x = 5/8
e.) 3(x-4)-4(2x-7)=2(x+5)
3x - 12 - 8x + 28 = 2x + 10
3x - 8x - 2x = 10 - 28 + 12
-7x = -6 /: (-7)
x = 6/7
f.) 2(2x-3)+3(4-x)=-(x+1)
4x - 6 + 12 - 3x = -x - 1
4x - 3x + x = -1 - 12 + 6
2x = - 7 /: 2
x = -3 i 1/2
g.) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1)
2x - 6 - 12 - 4x = -3x - 6 + 4x - 2
2x - 4x + 3x - 4x = -2 - 6 + 12 + 6
-3x = 10 /: (-3)
x = - 3 i 1/3