Answer:
x=5, y=2
Step-by-step explanation:
You simply write down what you see:
3x - 4y + 4x - 5y = 17
2x - 3y + 3x - 5y = 9
Then you simplify by grouping the x and the y terms:
7x - 9y = 17
5x - 8y = 9
Now you want to get equal amounts of x or y. Let's go for x. If we multiply the top eq with 5 and the bottom one with -7, we get:
35x - 45y = 85
-35x + 56y = -63
-------------------------+ now we can add them:
11y = 22 divide by -11
y = 2
So 7x - 18 = 17, x =5
Finally, it makes sense to double check by filling in these answers in the original equations, just to see if no mistakes were made:
3*5 - 4*2 = 7
4*5 - 5*2 = 10
7+10 = 17: ok!
2*5 - 3*2 = 4
3*5 - 5*2 = 5
4+5 = 9: ok!
42% of what is 63
0.42x = 63
x = 63/0.42
x = 150
There are 150 dancers in the school
One solution because all you need to do us 2x-5y=17+6x-15=51
Answer:
SOLVE FOR X, Y
x=12
y=−6
Step-by-step explanation:
Answer:The slope is 4.
Step-by-step explanation:
3 is x 1, 2 is y 2, 4 is also x 1, and 6 is y 2.
6-2/4-1
4/1
4
