Question

Ajutor! Dau 70 de puncte

a) 5(10x+3)+3(1-3x)=5(8x+4)+3 

b) 3(5x-7)+2(2x+17)=5(3x-4)+37

c) 8(3x-2)-13x=5(12-3x)+7x-19

d) 17(2-3x)+5(5x-6)=4(3-8x)+10

e) 10x +5(3x-7)+9(3-2x)=2(2x+5)+15

f) 6(5x-4)+5(8-3x)=3(2x+7)+22

g) 6(2x-9)+2(40-3x)=3(2x+5)+11

Answer 1

a) 50x+15+3-9x=40x+20+3
41x+18=40x+23
41x-40x=23-18
x=5

b) 15x-21+4x+34=15x-20+37
19x+13=15x+17
19x-15x=17-13
4x=4
x=1

c) 24x-16-13x=60-15x+7x-19
11x-16=-8x+41
11x+8x=41+16
19x=57
x=3

d) 34-51x+25x-30=12-32x+10
-26x+4=-32x+22
-26x+32x=22-4
6x=18
x=3

e) 10x+15x-35+27-18x=4x+10+15
7x-8=4x+25
7x-4x=25+8
3x=33
x=11

f) 30x-24+40-15x=6x+21+22
15x+16=6x+43
15x-6x=43-16
9x=27
x=3

g) 12x-54+80-6x=6x+15+11
6x+26=6x+26
x=0