Solve
1. 4(x+12)=8
2. 3y+4=5y-6
3. (3x+2y) (7x-8y)

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Solution

1) 4(x+12)=8
= x+12=2
x = -10
2). 3y+4=5y-6
10 = 2y
y= 5
3). (3x+2y) (7x-8y)
=(3×-10 +2×5)(7×-10-8×5)
= (-30+10)(-70-40)
=(-20)(-110)
= 2200

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