Science and Mathematics for Engineering 6th Edition by John Bird

Exercise 14

Solve the simultaneous equations:
(a) $\begin{array} { c } 3 a - 8 + \frac { b } { 8 } = 0 \\ b + \frac { a } { 2 } = \frac { 21 } { 4 } \end{array}$
(b) $\frac { 2 p + 1 } { 5 } - \frac { 1 - 4 q } { 2 } = \frac { 5 } { 2 }$
$\frac { 1 - 3 p } { 7 } + \frac { 2 q - 3 } { 5 } + \frac { 32 } { 35 } = 0$