Solve the simultaneous equations
3x - 4y = 18
9x + 2y = 12

3x - 4y = 18

9x + 2y = 12

Solve for x in the first equation.

3x - 4y = 18

3x = 18 + 4y

x = (18 + 4y)/3

x= 6+4/3y

Put x as 6+4/3y in the second equation and solve for y.

9x + 2y = 12

9(6+4/3y)+2y =12

12y+54+2y=12

14y+54=12

14y=12-54

14y=-42

Put y as -3 in the first equation to solve for x.

3x - 4y = 18

3x - 4(-3) = 18

3x+12=18

3x=18-12

3x=6

it is probably the graph on the bottom right.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500