11. 3(y-5)+8=17 12. 5(x+2)=6(2x+7) 13. 5(x+3)=8(10-x) - вопрос №633762611358171252627135381014892523 от zlatalobacheva 08.08.2020 09:21

Question

Алгебра: 11. 3(y-5)+8=17 12. 5(x+2)=6(2x+7) 13. 5(x+3)=8(10-x) 14. 8(9+2x)=5(2-3x) 15. 6(x-3)-10=2(x+2) 16. 5(x-1)+20=4(x-3) 17. 10y+2(7y-2)=5(4y+3)+3y 18. 8(3z-2)-13z=5(12-3z)+7z 19.1/3(2x-3)=4 1/6x

zlatalobacheva · Answer

11. 3(y-5)+8=17 3y-15+8=17 3y=24 y=812. 5(x+2)=6(2x+7) 5x+10=12x+42 -7x=32 x=4,5713. 5(x+3)=8(10-x) 5x+15=80-8x 13x=95 x=7,30714. 8(9+2x)=5(2-3x) 72+16x=10-15x 31x=-62 x=-215. 6(x-3)-10=2(x+2) 6x-18-10=2x+4 4x=32 x=816. 5(x-1)+20=4(x-3) 5x-5+20=4x-12 x=-2717. 10y+2(7y-2)=5(4y+3)+3y 10y+14y-4=20y+15+3y y=1918. 8(3z-2)-13z=5(12-3z)+7z 24z-16-13z=60-15z+7z 19z=76 z=4...