Question 563653
given:
(1) {{{ m = x }}}
(2) {{{ n = 2x }}}
(3) {{{ h = n + 4 }}}
(4) {{{ x + n + h = 64 }}}
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Substitute (2) into (3)
(3) {{{ h = 2x + 4 }}}
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(4) {{{ x + 2x + 2x + 4 = 64 }}}
(4) {{{ 5x = 60 }}}
(4) {{{ x = 12 }}}
Maggie is 12
Nigel is 24
Helen is 24 + 4 = 28
check:
{{{ 12 + 24 + 28 = 64 }}}
{{{ 36 + 28 = 64 }}}
{{{ 64 = 64 }}}
OK