Answer:
x = 5
Step-by-step explanation:
Given
13 = - 7 + 9x - 5x , that is
13 = - 7 + 4x ( add 7 to both sides )
20 = 4x ( divide both sides by 4 )
5 = x
15 cookies burned because if you Turn
into a decimal then multiply it by 20 you get 15 and thats your answer.
Answer:
5x+y=12
Step-by-step explanation:
10x+2y=-2=5x+y=12
Answer:y=7
Step-by-step explanation: