SOLUTION: solve by graphing. x+2y=10 and 2x+2y=12

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Question 184030This question is from textbook
: solve by graphing.
x+2y=10 and 2x+2y=12 This question is from textbook

Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!

x%2B2y=10-------------------------> EQn 1
2X%2B2Y=12------------------------> EQN 2
Working both eqn's via Slope-Intercept Form, y=mx%2Bb
In EQN 1,
2y=-x%2B10--->cross%282%29y%2Fcross%282%29=%28-x%2B10%29%2F2
y=%28-1%2F2%29x%2B%2810%2F2%29=%28-1%2F2%29x%2B5, EQN 1.1
Let f%28y%29=0
0=%28-1%2F2%29x%2B5
%281%2F2%29x=5---->highlight%28x=10%29
Let f%28x%29=0
y=%28-1%2F2%29%280%29%2B5
highlight%28y=5%29
In EQN 2:
2y=-2x%2B12----->cross%282%29y%2Fcross%282%29=%28-2x%2B12%29%2F2
y=%28-2%2F2%29x%2B%2812%2F2%29
y=-x%2B6, EQN 2.2
let f%28y%29=0
2%2A0=-2x%2B12
2x=12---->cross%282%29x%2Fcross%282%29=cross%2812%296%2Fcross%282%29
highlight%28x=6%29
let f%28x%29=0
2y=-2%2A0%2B12
cross%282%29y%2Fcross%282%29=cross%2812%296%2Fcross%282%29
highlight%28y=6%29
Mark x & y on EQN 1.1 and EQN 2.2 on the graph:
----->---> RED, EQN.1; GREEN, EQN 2
Thank you,
Jojo