Answer:
(13)
x= 8
y=11
(14)
x= 20
y=20.75
(15)
x=9
y=13
Step-by-step explanation:
(13) 8x-1 = 11x -25
24=3x
x= 8
8(8)-1 +15y-48= 180
15y=165
y=11
(14) 7x-44 + 4x + 4= 180
11x= 220
x= 20
4(20)+4+39= 8y-43
123=8y-43
166=8y
y=20.75
(15) 12x+1=15x-26
3x=27
x=9
28+15(9)-26+4y-9=180
4y=52
y=13
