Answer: 1) first number is -3 and 2nd number is 6.
Step-by-step explanation: equations are 5x+2y=-3 and 3x+3y=9
first start by trying to get either the x or y to the same number but 1 is negative and 1 is positive.
-3(5x+2y=-3) = -15x-6y=9
5(3x+3y=9) = 15x+15y=45
now cross out -15x and 15x so you're left with -6y=9 and 15y=45. Now combine like terms. You should get 9y=54. Now solve normally. Y=6.
Plug it into the first equation and solve.
5x+2(6)=-3
5x+12=-3
(subtract the 12 from both sides) 5x=-15
x=-3
QUESTION 2
Answer: first number is 7 and 2nd is 4
Step-by-step explanation: equations are 3x-6y=-3 and 2x+4y=30
first start by trying to get either the x or y to the same number but 1 is negative and 1 is positive.
2(3x-6y=-3) = 6x-12y=-6
3(2x+4y=30) = 6x+12y=90
now cross out-12x and 12x so you're left with 6x=-6 and 6x=90. Now combine like terms. You should get 12x=84. the answer is x=7
Plug it into the first equation and solve.
3(7)-6y=-3
-6y+21=-3
Now add -21 to both sides of the equation
-6y=-24
y=4