Answered

Get expert advice and community support for your questions on IDNLearn.com. Join our Q&A platform to access reliable and detailed answers from experts in various fields.

How to solve 7m + 2n = 21 and 10m + 4n = -10 using substitution. Step by step please and thank you!

Sagot :

7m+2n=21
-7m      -7m

2n=21-7m 
2        2

n=21-7m
       2

10m+4(21-7m/2)= -10
-10m                   -10m

4(21-7m/2)= -10-10m

(84-28m/2)= -10-10m
    x2                x2

84-28m    = -20-20m
+20+28m   +20+28m

104 = 8m
8         8

m=13

10(13) + 4n = -10
-130              -130

4n = -140
4         4

n= -35

If anything is unclear please feel free to ask.
We appreciate your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. Thanks for visiting IDNLearn.com. We’re dedicated to providing clear answers, so visit us again for more helpful information.