Help please will be markedas brainliest if correct

3x(7+10)=G+30

21x+30=G+30

-30 -30

21x=G

G=21x

5x(3+H)=15+45

15x+5h=15+45

-5 -5

15x+h=15+40

-15 -15

x(h)=40

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.