Question

Rezolvati ecuatiile :
a) 18(2-x)+6(7x-12)=5(2x-1)-3
b) 2(3x+4)-5(2x-3)=7(x-3)+11
c) 4(9x-4)-3(3x-10)+11=4(2x-21)-5
d) 2(5x-4)+6(4x-3)+11=6(3x-4)-7

Answer 1

a) 36-18x+42x-72=10x-5-3 => -18x+42x-10x=-8-36+72=> 14x=28=> x=2
b)6x+8-10x+15=7x-21+11=> 6x-10x-7x=-21+11-8-15=>-11x=-33=> x=3
c) 36x-16-9x-30+11=8x-84-5=>36x-9x-8x=-84-5+16+30-11=>19x=114=>x=6
d)10x-8+24x-18+11=18x-24-7=>10x+24x-18x=-24-7+8+18-11=>16x=-16=>x=-1