Find the value of x when the question is like that
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3x+20+4x-30=180°
7x-10=180°
7x=180°+10
7x=190°
x=190/7
x=27•14
7x-10=180°
7x=180°+10
7x=190°
x=190/7
x=27•14
ray654:
How to check if the answer is correct
put the value of x in the equation.
thanks
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