07 EXAMPLE 4 2 + 5 find (x - y).
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07 EXAMPLE 4 2 + 5 find (x - y).

11th - 12th Class
Maths
Solution
98
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SOLUTION We have [ begin{array}{l} Rightarrowleft[begin{array}{cc} 2 & 3 & 4 5 & x end{array}right]+left[begin{array}{cc} 1 & y 0 & 1 end{array}right]=left[begin{array}{cc} 7 & 0 10 & 5 end{array}right] Rightarrowleft[begin{array}{cc} 6 & 8 10 & 2 x end{array}right]+left[begin{array}{cc} 1 & y 0 & 1 end{array}right]=left[begin{array}{cc} 7 & 0 10 & 5 end{array}right] Rightarrow quad 2 x+1=5 text { and } 8+y=0 left.begin{array}{c} 6+1 10+0 & 2 x+1 end{array}right] Rightarrow quad 2 x+left[begin{array}{cc} 7 & 0 10 & 5 end{array}right] end{array} ] [comparing the corresponding elements ( Rightarrow quad x=2 ) and ( y=-8 ) [ Rightarrow quad(x-y)=2-(-8)=10 ]
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