Answer:
Equation: x + 16 + 13 + x = 21 ; x = -4
Step-by-step explanation:
x + 16 + 13 + x = 21 (Given)
2x + 29 = 21 (Added like terms)
2x = -8 (Subtracted 29 on both sides)
x = -4 (Divided 2 on both sides)
Answer:
day 15
Step-by-step explanation:
13 - 6 miles = 7 miles or 14 one half miles
week1 + 14 weeks = week 15
6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13
Answer:
a) 
b) y
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
Rewrite equations:
y=x+4;−2x+y=−1
Step: Solvey=x+4for y:
y=x+4
Step: Substitutex+4foryin−2x+y=−1:
−2x+y=−1
−2x+x+4=−1
−x+4=−1(Simplify both sides of the equation)
−x+4+−4=−1+−4(Add -4 to both sides)
−x=−5
−x
−1
=
−5
−1
(Divide both sides by -1)
x=5
Step: Substitute5forxiny=x+4:
y=x+4
y=5+4
y=9(Simplify both sides of the equation)