Question

the sum of four times a number and 3 is equal to three times the number

Answer 1

let the number be x
4times the number=4x
3times the number= 3x
therefore
4x+3=3x
collect like terms
4x-3x=-3
x=-3
the number is -3

Answer 2

five times a number subtracted from twelve is triple is the number

Answer 3

12-5x=3x
collect like terms
12=5x+3x
12=8x
12/8=x
so the number is 3/2 or 1.5

Answer 4

if the sum of a number and one is tripled the result is five less than twice the number