Let y = the length of the 3rd side
x+3 + 2x+4 + y = 6x
x + 2x + 3 + 4 + y = 6x
3x + 7 +y = 6x
7 + y = 3x
y = 3x - 7
The length of the third side in terms of x is 3x-7
I need help with this too it’s confusing and I don’t understand it.
Answer:
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Step-by-step explanation:
sorry if it is wrong. I havent done this yet
639÷9=71. You can check your answer by doing 71x9=639