Równania 1) 7x-4=12x+3 2) -2x+5=8x-7 3) 1½x-3=15x-8 4) 2(x-3)=10 5) 7(x-2)=x+1

1) 7x-4=12x+3 7x-12x = 3+4 -5x = 7 /:(-5) x = -7/5 x = -1,4 2) -2x+5=8x-7 -2x-8x = -7-5 -10x=-12 /: (-10) x = 12/10 x = 1,2 3) 1½x-3=15x-8 3/2x-30/2x = -8+3 -27/2x = -5 /*2 -27x = -10 /:-27 x = 10/27 4) 2(x-3)=10 2x-6=10 2x=10+6 2x=16 /:2 x = 8 5) 7(x-2)=x+1 7x-14=x+1 7x-x=1+14 6x = 15 /:6 x = 15/6 x = 2,5

1) 7x-4=12x+3 7x-12x=3+4 -5x=7 x=-1,4 2) -2x+5=8x-7 -2x-8x=-7-5 -10x=-12 x=1,2 3) 1½x-3=15x-8 1½x-15x=-8+3 -13,5x=-5 x=¹⁰/₂₇ 4) 2(x-3)=10 2x-6=10 2x=10+6 2x=16 x=8 5) 7(x-2)=x+1 7x-14=x+1 7x-x=1+14 6x=15 x=2,5