Answered

Alex used the equation y = 2x + 4 to find his cost in pesos, y, for downloading x songs. The coordinate pair (x, 30) represents the P30 he spent to download x songs. What is the value of x?

Sagot :

Rider21viz
Just substitute your value of  y = 30 to the equation to find the value of x:


So we will have:

y = 2x + 4
30 = 2x + 4
30 - 4 = 2x 
26 = 2x
26/2 = x 
13 = x ANSWER

Therefore there are 13 songs downloaded for the cost spent at 30php.