5=3+7x 1/2x=11 4/9x=1/3 1/3x+1=5

5=3+7x x=3+7-5 x=5 1/2x=11 x=11-1,2 x=9,8

5=3+7x -7x=3-5 -7x=-2/:(-7) x=2/7 1/2x=11/*2 x=22 4/9x=1/3/*9 4x=3/:4 x=3/4 1/3x+1=5 1/3x=4/*3 x=12

1. 5=3+7x 5-3 =7x 2 =7x/7 x = 2 /7 2.1/2x=11 / 1/2 x =22 3. 4/9x=1/3 / 4/9 x = 0,75 lub 3/4 4. 1/3x+1=5 1/3x=4/*3 x=12