Question 632444
y = 2x + 5 ... Start with the given equation



<font color="red">7</font> = 2(<font color="blue">1</font>) + 5 ... Plug in x = <font color="blue">1</font> and y = <font color="red">7</font>



7 = 2(1) + 5



7 = 2 + 5 ... Multiply



7 = 7 ... Add



Since that last equation is true, this means that {{{y=2x+1}}} is true when {{{x=1}}} and {{{y=7}}}



Therefore, (1,7) is indeed a solution to {{{y=2x+1}}}


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