oblicz 7x+1=50 6x+9=81 4x-5=3x+8 10x-9=61 7x-9=6x-1 28x+4=15x+36 5(x+2)-10=25

1) 7x+1 = 50 |-1 7x = 49 |:7 x = 7 2) 6x+9 = 81 |-9 6x = 72 |:6 x = 12 3) 4x-5 = 3x+8 4x-3x = 8+5 x = 13 4) 10x-9 = 61 |+9 10x = 70 |:10 x = 7 5) 7x-9 = 6x-1 7x-6x = -1+9 x = 8 6) 28x+4 = 15x+36 28x-15x = 36-4 13x = 32 |:13 x = 32/13 7) 5(x+2)-10 = 25 5x+10-10 = 25 5x = 25 |:5 x = 5 Mam nadzieję, że pomogłem :)