Explanation for Question 17 From the Math (No Calc) Section on the 2019 May Sat
Question 17 says a pizza parlor sells pizza slices for $3 2 each and cows zones for $4. 3 Each a group of friends spent $51 on pizza slices and Cal zones 4 at the parlor. If they bought six Cal zones, 5 how many pizza slices did they buy? So we're going to start by setting 6 up two different equations. First, 7 we know that pizza slices go for $3 each. 8 So I'm going to use QI as my variable for pizza slices and write 9 that is three P. Then we know that Cal zone sell for $4 10 each. So I'm going to use C as my variable for zones and set 11 that up as three P plus four Z for C. 12 And in total, the group of friends spent $51 on both pizza slices 13 and chasms. So we're gonna put 51 on the right side 14 of the equation. Finally, 15 we know that they bought six cows zones. 16 And so we know that C is equal to six. 17 So now all we have to do is plug in six for C and 18 then solve for P. So let's do that three P plus four times 19 six is equal to 51 that becomes three P 20 plus 24 is equal to 51. 21 And then we can subtract 24 from both sides and get three P 22 is equal to 27. 23 Then we divide both sides by three may get he is 24 equal to not. And that's your final answer.