6y - 4 = 80 ==> 6y = 80 + 4 = 84 ==> y = 84/6 = 14
y = 14
3x - y = 10 ==> 3x = 10 + y ==> x = (10 + y)/3
Using the value of y = 14:
x =(10+14)/3 = 24/3 = 8
Answer:
x = 8
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