Question

express the equation a)20 less than a number b)half a number is another number.There sum is 30 c)2/3 if weight of a boy is 32kg d)cost of 5 pens is 90$ e)Milly's father is 49 years old.He is 4 years older 3 times milly's age PLS I NEED THE ANSWER​

Answer 1

a) n-20
b.)30=1/2n+1/2
c.)2/3n=30
d.)5n=90
e.)M•3+4=49