1.) 6x + 3x^2 - x - x^2 2.) 5 + 2x + y + 2x - 1
3.) 2x + 2y + x^2 - x + x^2

please solve this

1. 6x + 3x² - x - x²

2. 5 + 2x + y + 2x - 1

3. 2x + 2y + x² - x + x²

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

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