Question

por favor me responda com as contas pfvr

Answer 1

4x=20
x=5
----
3x=15
x=5

$\frac{x}{4} =9$
x=36
----
x-24=12
x=12+24
x=36

x+5=21
x=21-5
x=16
----
$\frac{x}{2}=8$
x=16

3x+9=-18
3x=-18-9
3x=-27
x=-9
----
-2x-6=12
-2x=12+6
-2x=18
x=-9

2(9x-3)=12
9x-3=6
9x=6+3
9x=9
x1
----
x+1=2
x=2-1
x=1