1. y=kx-3 7/9
y= 4 2/9; x=15.
15k= 4 2/9 - 3 7/9
15k= 38/9 - 34/9
15k= 4/9
k= 4/9 : 15
k= 4/135
2. -7x = 13-2(8x-7)
-7x=13-16x+14
16x-7x=27
9x=27
x=3
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Answers & Comments
1. y=kx-3 7/9
y= 4 2/9; x=15.
15k= 4 2/9 - 3 7/9
15k= 38/9 - 34/9
15k= 4/9
k= 4/9 : 15
k= 4/135
2. -7x = 13-2(8x-7)
-7x=13-16x+14
16x-7x=27
9x=27
x=3