Math
posted by Ma names Jeff
17) solve this linear system using the method of substitution.
2yx=10
y= 3/2x1
20) simplify then solve by substitution
2(x4)+y=6
3x2(y3)=13
just need help with these 2.

Damon
y= 3/2x1
which I assume means
y = (3/2)x  1
so use that
2 [ (3/2)x  1 ]  x = 10
3 x  2  x = 10
4 x = 8
x = 2 etc 
Damon
2(x4)+y=6
3x2(y3)=13
2 x  8 + y = 6
3 x  2 y + 6 = 13
2 x + y = 14
3 x 2y = 7
y = 14  2x use that
3 x  2 (142x) = 7
3 x  28 + 4 x = 7
7 x = 35 = 7*5
so
x = 5
go back and find y
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