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Check Your Understanding If ( 2 x+y=4 ) and ( 2 x-y=8 ), solve for ( x ) and ( y ). [ begin{array}{l} x=

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Check Your Understanding If \\( 2 x+y=4 \\) and \\( 2 x-y=8 \\), solve for \\( x \\) and \\( y \\). \\[ \\begin{array}{l} x= \\\\ y= \\end{array} \\] If \\( x-y=10 \\) and \\( 2 x+3 y=0 \\), solve for \\( x \\) and \\( y \\). \\[ \\begin{array}{l} x=\\quad v \\\\ y=\\square \\end{array} \\] If \\( x+y=3 \\) and \\( y / x=2 \\), solve for \\( x \\) and \\( y \\). \\[ x= \\] \\[ y= \\] If \\( x+y=4 \\) and \\( x-y=3 \\) then \\( x+2 y \\) is: The sum of Bill and Ted's age is 60. In two years, Bill will be three times as old as Ted. How old are Bill and Ted now? Bill's age \\( = \\) \\[ \\text { Ted's age }= \\]

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