Question

the equation 5x+2y=6
(a) solve for variable y
(b) use this result to find y with x=-4
I think y = 3-5x over 2 (that's a fraction :))
not sure how to do the other part as what I have tried does not make sense
thanks in advance

Answer 1

the first one should be\[\frac{ 6 - 5x }{ 2 }\]not\[\frac{ 3 - 5x }{ 2 }\] ... i think it's a typing mistake...

for the second part
consider the eqaution\[y = \frac{ 6 - 5x }{ 2 }\]
here we don't know the value of x or y.. but the question gives us a value for x which is (-4) and asks as the value of y...
all we have to do is find y when x is ( -4) in above equation
\[y = \frac{ 6 - 5x }{ 2 }\]\[y = \frac{ 6 - [5\times(-4)] }{ ? }\]\[y = \frac{ 6 - (-20) }{ 2 }\]\[y= \frac{ 6+ 20 }{ 2 }\]\[y= \frac{ 26 }{ 2 }\]\[y= 13\]

hope this will help ya!!

Answer 2

lets hope so and thank you, I will study for a while and hopefully come up with the correct answer :)

Answer 3

u r welcome!!!