Question

9-4x=4 (x+1)-3 (2x+1)-4 , -3 (2x-1)-4 (3x+1)=5 (3x-7)+1 , 3+2 (7x-9)=7 (x+1)-4 (2x-3) , (x+2) la a doua -(1-x) la a doua =0

Answer 1

9-4x=4x+4-6x-3-4
9-4x=-2x-3
-4x+2x=-3-9
-2x=-12
-x=-6
x=6
-6x+3-12x-4=15x-35+1
-18x-1=15x-34
-18x-15x=-34+1
-33x=-33
x=1
3+14x-18=7x+7-8x+12
14x-15=-x+19
14x+x=19+15
15x=34
x=34/15
x^2+4x+4-1+2x-x^2=0
6x-3=0
6x=3
x=3/6
x=1/2

Answer 2

9-4x=4(x+1)-3(2x+1)-4⇒
9-4x=4x+4-6x-3-4⇒9-4x=-2x-3⇒-4x+2x=-9-3⇒-2x=-12⇒x=-12\-2⇒x=6

b)
-3(2x-1)-4(3x+1)=5(3x+7)+1⇒
-6x+3-12x-4=15x+35+1⇒
-18x-1=15x+36⇒-18x-15x=36+1⇒-33x=37⇒x=-37\33

c)3+2(7x-9)=7(x+1)-4(2x-3)⇒
3+14x-18=7x+7-8x+12⇒
14x-15=-x+19⇒14x+x=15+19⇒15x=34⇒x=34\15

d)(x+2)²-(1-x)²=0⇒
x²+4x+4-(1-2x+x²)=0⇒
x²+4x+4-1+2x-x²=0⇒
6x+3=0⇒6x=-3⇒x=-3\6⇒x=-1\2
succes