-2x - y = -9
5x - 2y = 18

x = 4,

y = 1

Step-by-step explanation:

Let us solve through elimination ~

1. Multiply top equation -2x - y = -9 by -2, adding that product to the bottom equation 5x - 2y = 18:

-2 (-2x - y = -9)     ⇒     4x + 2y = 18    

+  5x - 2y = 18         +    5x - 2y = 18

2. To further express this algebraic process of adding to find x in this case:

     4x + 2y = 18        ⇒     9x = 36     ⇒     x = 4

+    5x - 2y = 18

3. Now let us substitute this value of x into the top equation 4x + 2y = 18:

4( 4 ) + 2y = 18    

4. And solve for y:

16 + 2y = 18    ⇒   2y = 2   ⇒    y = 1

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

sine

step-by-step explanation: