Answer:
x=3
y=6
Step-by-step explanation:
The goal of the elimination method is to cancel out one of the variables when the equations are added or subtracted. Let's say we will cancel out the two "x" first. Multiply both of the equations entirely so that the "x" is the same.
{7x - 4y = -3} *3 => 21x - 12y = -9
{3x - 9y = -45} *7 => 21x - 63y = -315
Subtract the first equation from the second equation. Subtract each term separately and remember subtracting a negative number becomes adding.
. 21x - 12y = -9
<u>- 21x - 63y = -315</u>
. 0x + 51y = 306 Notice x variable cancels out
. 51y = 306 <= Divide both sides by 51
. y = 6
Substitute y=6 into any of the equations. Then isolate x. I will use 7x-4y=-3
.
7x - 4y = -3
7x - 4(6) = -3 <=simplify
7x - 24 = -3 Start isolating x by bringing everything to the right side
7x = -3 + 24 <=add 24 to both sides. This cancels out 24 on the left.
7x = 21 <=divide both sides by 7
x = 3
The solution of the system is (3, 6).
4 cups of milk to 1 cup of oatmeal
Answer:
<h2>2+5 = 7 is the related addition sentence that shows the commutative property of addition because it has the same result of addition as 5+2=7.</h2>
Commutative property of addition says that if we have two numbers we have interchange them and this doesnot affect the result....
Step-by-step explanation:
2+5 = 7 is the related addition sentence that shows the commutative property of addition because it has the same result of addition as 5+2=7.
<h3>Commutative property of addition says that if we have two numbers we have interchange them and this doesnot affect the result....</h3>