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Explanation & Answer
(1)
m/20 =5/4
Cross multiplying 4m =20*5=100
4m =100
m=100/4 =25
(2)
7y+5 =3y-31
7y-3y= -31-5=-36
4y =-36
y =-9
(3)
1/2 (t+8) =32
t+8 =2*32=64
t+8=64
t =64-8=56
t=56
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