Question

If 3x=27and 3y=243 then find value of x+y and x- y

Answer 1

3x=27 3y=243
x=9 y=81

x+y=81+9
=90

x-y=9-81
=-72

please mark as brainiest please

Answer 2

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Hello dear

$3x = 27 \\ \\ 3y = 243 \\ \\ first \: we \: have \: to \: find \: the \: value \: of \: x \\ \\ => 3x = 27 \\ \\ x = \frac{27}{3} \\ \\ x = 9 \\ \\ => 3y = 243 \\ \\ y = \frac{243}{3} \\ \\ y = 81$
$=> x + y \\ \\ 9 + 81 \\ \\ 90$
$=> x - y \\ \\ 9 - 81 \\ \\ - 72$
Thanks
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