The answer is <span>He subtracted 10 from the right side instead of adding 10 to the right side
Let's solve it:
</span><span>2x + y = 5
x − 2y = 10
________
Rearrange first equation to get y:
y = 5 - 2x
________
Substitute y into the second equation:
x - 2(5 - 2x) = 10
________
Multiply the terms:
x - 10 + 4x = 10
________
Combine the terms:
5x - 10 = 10
________
Add 10 on the both sides of the equation:
5x = 10 + 10
5x = 20
x = 4</span>
Answer:
maybe do the math
Step-by-step explanation:
Answer:
(-6,-1)
Step-by-step explanation:
let b be x2,y2
then apply mid point formula
x=(x1+x2)/2
y=(y1+y2)/2
Answer:
78
Step-by-step explanation:
Find the prime factorizations of the two numbers:
26 = 2 * 13
39 = 3 * 13
The LCM is the product of common and not common factors with the higher exponent.
LCM = 2 * 3 * 13 = 78
Answer: 78