Answer:
20
Step-by-step explanation:
Answer is -8
(-1)+(-7) turns into (1)+(7)=8 and then back to original which will be -8
Sometimes it will, and sometimes it won't.
I reason as follows:
(21 + x) + (30 + 2x) = 51 + 3x has an 'x' term
(42 + x) + (30 - x) = 72 has no 'x' term.
Answer:
The last one :{(5, 0), (0, 1), (5, 2), (4,4)}
Step-by-step explanation:
