Answer:
1) x = 18 2) x = 7
Step-by-step explanation:
Edit: Decided to solve the second too! :)
1)
12/16 = x/(x+6)
12x + 72 = 16x
72 = 4x
x = 18
2)
(-4 + 4x)/64 = 27/72
-288 + 288x = 1,728
288x = 2,016
x = 7
y+2x=7 (1)
x=3+y (2)
Replace x = 3+y (2) into (1) => y+2(3+y) = 7
=> y = 1/3 and x = 3+1/3 =10/3
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