Answer:
12
Step-by-step explanation:
Answer:
40
Step-by-step explanation:
2 •(3(5+2)-1)
2 ·(3(7)-1)
2·(21-1)
2·20
=40
Answer:
(-2, -4)
Step-by-step explanation:
–2x + 2y = -4
3х + Зу = -18
Divide the first equation by 2
–2x/2 + 2y/2 = -4/2
-x +y = -2
Divide the second equation by 3
3х/3 + Зу/3 = -18/3
x + y = -6
Add these equation together
-x +y = -2
x + y = -6
-------------------
0x + 2y = -8
2y = -8
Divide each side by 2
2y/2 = -8/2
y = -4
Now we need x
x+y = -6
x-4 = -6
Add 4 to each side
x-4+4 = -6+4
x = -2
So you would find out what number in the 9 times tables goes into 25 and there's your answer x
