Answer:
D) x=-1, x=-9
Step-by-step explanation:
x=-1, x=-9
Answer:
Roy is 6 years old and Aaron is 1 year old.
Step-by-step explanation:
A is Aaron's age,
R is roy's age,
A = R - 5
R + 4 = 2(A+4)
We can distribute first,
R + 4 = 2A + 8
Subtract 4 from each side,
R = 2A + 4
Since A = R - 5, you can substitute in R - 5 for A in the equation,
R = 2(R-5) + 4
Distribute,
R = 2R - 10 + 4
Since - 10 + 4 = -6, we can do this,
R = 2R - 6
Subtract R from both sides,
0 = R - 6
Add 6 to both sides and you have part of your answer;
R = 6
Since A = R - 5,
A = 6 - 5
A = 1, so Aaron's age is 1.
1/2m -3/4n = 16
solve your system of equations.
n=8: (1/2)(m)+((−3)/4)(n)=16
Solve n=8 for n:
Substitute (8) for n in 1/2m+−3/4n=16:
1/2m+−3/4n=16
1/2m+−3/4(8)=16
1/2m−6=16(Simplify both sides of the equation)
1/2m−6+6=16+6(Add 6 to both sides)
1/2m=22
1/2m1/2 = 22 / 1/2(Divide both sides by 1/2)
m=44
