What is the result of adding these two
equations?
2x + 7y= 4
- 2x – 8y = -2

-y = 2.

Step-by-step explanation:

2x + 7y= 4

- 2x – 8y = -2  

 Adding we eliminate   x because 2x + -2x = 0:-

0 - y = 4  + -2

-y = 2.

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.