Question

ex: 21. Dau coroana! Urgent!!❤

Answer 1

a)Numitor comun 12
4(x+5)+3(2x+3)=2(x-5)+7
4x+20+6x+9=2x-10+7
10x+29=2x-3
8x=-32 =>x=(-4)

b)Numitor comun 8
4(3x-5)-2(5x+1)+8=2x+6-4(x-4)
12x-20-10x-2+8=2x+6-4x+16
2x-14=-2x+22
4x=36 =>x=9

c)Numitor comun 30
5(2x+7)-18(x+1)=2(3x+1)-x-11
10x+35-18x-18=6x+2-x-11
-8x+17=5x-9
-13x=-26 =>x=2

d)Numitor comun 2
8(x-2)+3x+7=10(x+3)-x+5
8x-16+3x+7=10x+30-x+5
11x-9=9x+35
2x=44 =>x=22

e)Numitor comun 2
10(x+2)+3x-7=10(x+8)-x+9
10x+20+3x-7=10x+80-x+9
13x+13=9x+89
4x=76 =>x=19

f)Numitor comun 12
2(4x-5)-4(3x+2)=6(x-1)+18
8x-10-12x-8=6x-6+18
-4x-18=6x+12
-10x=30 =>x=(-3)