Question 326970
4.b
(x+4)(x+4)
x^2+4x+4x+16
x^2+8x+16
5.a
-7-x=-72+4x
-5x=-65
x=+13
5.b
3x+a-bx
3+a-b
5.c
5-2x>4
-2x>-1
x>+1/2
5.d
(3x-7)/5=2x
3x-7=2x*5
3x-7=10x
-7=7x
-1=x
or
x=-1