All real numbers.
No matter what you plug in, there will always be a corresponding y - value.
First, let's multiply the first equation by two on the both sides:
<span>8x + 7y = 39 /2
</span>⇒ 16x + 14y = 78
Now, the system is:
<span>16x + 14y = 78
</span><span>4x – 14y = –68
</span>
After adding this up in the column:
(16x + 4x) + (14y - 14y) = 78 - 68
20x = 10
⇒ x = 10/20 = 1/2
y can be calculated by replacin the x:
<span>8x + 7y = 39
</span>⇒ 8 · 1/2 + 7y = 39
4 + 7y = 39
7y = 39 - 4
7y = 35
⇒ y = 35 ÷ 7 = 5
Answer:
4m + 4m + 6
3+3+5+3
10m+12+(-2m)-6
Step-by-step explanation:
Welcome
Answer:
Equality
Inequality
Step-by-step explanation:
Answer:
110
Step-by-step explanation:
Y and X have to equal 180
70+x+180
=110