Alex spent 3/7 of his money. He gave his sister 1/4 of the remainder. He had $120 left. How much did he have in the beginning?

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated

5 feet of chain cost $9

so the answer is 1.80

i don't even know how to read that, ill try to do it if you translate it into english.