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:

a=9

step-by-step explanation: lmk if you need a explanation

the solution is x=1

step-by-step explanation:

we are given our   equation as

let's assume

left side function is

right side function is

now, we can draw graph

and then we can get intersection point

the intersection point will be solution

so, the solution is

x=1