[Steps Shown] (a) Solve 4x+5y=-5 , 3x+y=21 , (b) Solve 3x+y=7 , 3x+y=10
Question: (a) Solve
\[\begin{aligned} & 4x+5y=-5 \\ & 3x+y=21 \\ \end{aligned}\](b) Solve
\[\begin{aligned} & 3x+y=7 \\ & 3x+y=10 \\ \end{aligned}\]
Deliverable: Word Document 
Solution: Expand the following algebraic expression:
(All Steps) Simplify without negative exponents (ax)^-2 10^-3
![[Solution] Express the following in scientific notation](/images/solutions/MC-solution-library-39820.jpg "[Solution] Express the following in scientific notation 0.0035")
[Solution] Express the following in scientific notation 0.0035
[Step-by-Step] Simplify (9x^2-3x)/(3x) (x^2-5x+4)/(x-1)
[Solution Library] Solve
How to Solve Quadratic Equations - MathCracker.com