1. 3х + 5 = 8х – 15 (х; 0)

2. 3х + 16 = 8х – 9 (х; 4)

3. 4 + 25у = 6 + 24у (2; у)

4. 4(х – 3) – 16 = 5(х – 5) (х; 3)

5. 5х + 27 = 4х + 21 (х; 0)

6. 4(3 – 2у) – 42 = 2(3 + 2у) (–3; у)

7. 3(4х – 8) = 3х – 6 (х; –2)

8. 1 – 5(1,5 + х) = 6 – 7,5х (х; –4)

9. 3(5 – х) + 13 = 4(3х – 8) (х; 0)

1. 3x+5=8x-15 3x-8x=-5-15 -5x=-20 x=-20:(-5) x=-42. 3x+16=8x-9 3x-8x=-16-9 -5x=-25 x=-25:(-5) x=-53. 4+25y=6+24y -24y+25y=6-4 1y=2 y=2:1 y=24. 4(x-3)-16=5x(x-5) 4x-12-16=5x^2-25x -12-16=25x-25x-4x -28=-4x x=-28:(-4) x= -75. 5x+27=4x+21 5x-4x=-27+21 1x=-6 x=-6:1 x=-66. 4(3-2y)-42=2(3+2y) 12-8y-42=6+4y -38=10y y=-38:10 y=-3,87. 3(4x-8)=3x-6 12x-24=3x-6 6-24=3x-12x -18=-9x x=-18:(-9) x=-28 и 9 неохото писать :)