To do this, add the equations together like this,
3x + 4y = 2 plus
4x - 4y = 12
-x = 14
Multiply the negative sign to both sides because the x cannot be a negative.
x = -14
Now plug in -14 for a x value in one equation, like this to get the y value:
3(-14) + 4y = 2
-42 + 4y = 2
Add 42
4y = 44
y = 11
Your x and y values are:
x = -14
y = 11
Answer:
12.73
Step-by-step explanation:
$63.64 * .20 = 12.73
I’m pretty sure it’s 43.8
400 ÷ 77 x 100 + 2000 - 55 + 999
u would use dmas :
1. division
2. multiplication
3. addition
4. subtraction
400 ÷ 77 = 5.19
5.19 x 100 + 2000 - 55 + 999
5.19 x 100 = 519
519 + 2000 - 55 + 999
519 + 2000 + 999 = 3518
3518 -55 = 3463
hope this helps
