Answer:
1. 19 and 34
2. 1 and 26
Step-by-step explanation:
1. x + y = 53 - diba ganyan yung first part
x - y = 15 - tapos kase sabe difference
x = y + 15 - inequate ko value ng x gamit ang y + 15 (lipat sa kabila)
y + 15 + y = 53
2y + 15 = 53
2y = 53 - 15
2y = 38
y = 19
then solve :
x + (19) = 53
x = 53 - 19
x = 34
2.
12x + 13y =
x + y = 27
x = 27 - y
12(27 - y) + 13y = 350
y = 26
then solve for x
