20= 1/2 (4x-6)
Multiply the bracket by 1/2.
(1/2)(4x)=2x ( cross out 2 and 4, divide by 2)
2/2=1, 4x/2=2x
(1/2)(-6)=-3 ( cross out 2 and -6 , divide by 2)
2/2=-1 , -6/2=-3
20=2x-3
Move -3 to the other side. Sign changes from -3 to +3.
20+3=2x-3+3
20+3=2x
23=2x
Divide by 2 for both sides.
23/2=2x/2
x=23/2 and x=11 1/2
Answer: x=23/2 and x=11 1/2