Question

Solve: 4(a+3)=18-2(3-2a)

Answer 1

if you replace a=1 then you get,
4(1+3)=18-2(3-2(1))
4(4)=16(3-2)
16=16(1)
...16=16


therefore it is proved !

Answer 2

here ...here is your answer..
4a +12= 52-36a-6+4a
4a+36a-4a =52 -6 -12
40a -36a =52-18
64a = 34
a. = 34/64
a. =17/32