Question

pls give me answer fast it's urgent​

Answer 1

$\large {\red {\underline {\overline {\mid {\sf {Solution \: 5:-{\mid }}}}}}}$

$Sum \: of \: (a - b) \: and\: (2a + b) \\ = 3a \\ \\ Subtracting\: a + 2b\: from \: the \: sum = 3a - a - 2b \\ 2a - 2b$

$\small{\orange {\boxed {\bf {a) 2a - 2b}}}}$

$\large {\red {\underline {\overline {\mid {\sf {Solution \: 6:-{\mid }}}}}}}$

$Simplifying \\(a + b - 3) - (b - a + 3) + (a - b + 3) \\ = a + b - 3 - b + a - 3 + a - b + 3 \\ = 3a - b - 3$

$\small{\orange {\boxed {\bf {c) 3a - b - 3}}}}$

$\large {\red {\underline {\overline {\mid {\sf {Solution \: 7:-{\mid }}}}}}}$

$y² + y - a = 3 \\ Putting, \: y = 1 \\ 1 + 1 - a = 3 \\ a = -1$

$\small{\orange {\boxed {\bf {a) -1}}}}$