2x-4+4x-1=8x-43
-2x=-38
x=19
so QS=2(2*19-4)=68
Answer:x=1/2
Step-by-step explanation:
9x-22=x+26
8x=4
X=1/2
5 x 10^-2, 50%, 1/3, 0.6
Second option
1 meter = 1000 millimeters
<span>5x-6y=-15
5x+6y=12
---------------add
10x = -3
x = -3/10
x = -0.3
</span>5x+6y=12
5(-0.3) + 6y = 12
6y = 12 + 1.5
6y = 13.5
y = 13.5 / 6
y = 2.25