GMAT Linear Equations: X+1=t and t=3-x, then x=

If x + 1 = t and t = 3 - x, then x =

linear equationssimultaneous equations

Explanation	Calculations	Help
$We use "Substitution" to replace t with the expression from the first equation in the second equation.$	$x + 1 = 3 - x$
$We then collect like terms to group the x terms on one side and the constant terms on the other side.$	$x + 1 + x = 3 2 x + 1 = 3$
$We then subtract 1 from both sides and divide by 2 to isolate x .$	$2 x = 2 x = 1$

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x = 1

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