Question 61208
{{{5(2a + b)-(a + 3b)}}}Multiply the 5 at the front of the first bracket through that bracket to get
{{{10a + 5b -(a + 3b)}}} Multiply the minus 1(the 1 is assumed) at the front of the second bracket through the bracket to get
{{{10a + 5b - a - 3b}}} Add like terms to get
{{{9a + 2b}}}