Graphing it out by literally finding random x values and plugging it into the equations (e.g. for x=1 and y=2x-1, 2*1-1=1, so we have (1,1)) then connecting the dots (make sure you're only connecting dots from the same equation!), we connect them and you can easily find the answer from there!
Answer:
Step-by-step explanation:
6x - 5 + 3x - 4 = 180 {Supplementary angles}
6x + 3x - 5 - 4 = 180
Combine like terms
9x - 9 = 180
Add 9 to both sides
9x = 180 + 9
9x = 189
Divide both sides by 9
x = 189/9
x = 21
Answer:
2x + 3 = 13
Step-by-step explanation:
The answer to this should be a-8b+13c
a - {4b - [a - (5b - c) + 3c - (a - b - 9c)]}
=a - {4b - [a - 5b + c + 3c - a + b + 9c]}
=a - {4b - [- 4b+ 13c]}
=a - {4b + 4b -13c}
=a - 8b + 13c
Hope this helped :)
Have a great day