x+y=7 y=x+5 x+y=7 y=x+5 Solution x + y = 7 and y = x +5 Here we have two relativ

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x + y = 7    and   y = x +5    Here we have two relatively simpleequations> However, they both have two variables.                                             if we substitute what y is equal to in the secondequation into the first equation, we get a          more complicated equation, but itwill have only one variable. so , x + x + 5 = 7 and so, 2x + 5 = 7     now we subtract the 5 from both sides, to furtherisolate the x. so,    2x = 2       now divideboth sides by 2 so, x = 1       Now go backto either original equation to find y y = x + 5 = 1 + 5 = 6   So,, x = 1 and y =6 hope this helps

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