Question

Rozwiąż równania : a) x+4-5(x-8) = x - 6
b) 6x - (x-1) = 6
c) 2(x-1) + 3(x-2) = 7
d) 3(x+2) + 2(2x-3) = x -12

Answer 1

a)

x+4-5(x-8) = x - 6

x+4-5x+40=x-6

x-5x-x=-6-4-40

-5x=-50/:(-5)

x=10

b)

6x - (x-1) = 6

6x-x+1=6

5x=6-1

5x=5/:5

x=1

c)

2(x-1) + 3(x-2) = 7

2x-2+3x-6=7

2x+3x=7+2+6

5x=15/:5

x=3

d)

3(x+2) + 2(2x-3) = x -12

3x+6+4x-6=x-12

3x+4x-x=-12-6+6

6x=12/:6

x=2