X+15 = 3x - 7 => 22 = 2x => x=11
Answer:
y =2
Step-by-step explanation:
Substitute -10 for x:
2(-10)-9y = -38
-20-9y = -38
-9y = -18
9y = 18
y = 2
1 toy costs $3 ( $3 x 1 = $3)<span>
2 toys cost $6 ( </span> $3 x 2 = $6)<span>
3 toys cost $9 </span>( $3 x 3 = $9)
4 toys cost $12 ( $3 x 4 = $12)
answer 4 toys will cost $12
Option D. 96 is the correct answer.
Explanation:
Let the higher grade be = x
Let the lower grade be = y
As given, The difference of the two grades is 16
or
.... (1)
The sum of one-eighth of the higher grade and one-half of the lower grade is 52.
... (2)
Putting the value of x=16+y in equation (2)






As x=16+y
x=16+80 = 96
Hence, higher grade is 96.