Question 170837
lets call what Tina,Dawn,and Harry raised, t,d,and h respectively
:
t+d+h=175......eq 1
t=3d...........eq 2
d=2h...........eq 3
:
lets re write eq 3 as h=d/2......now take the revised value of h and t's value in eq 2 and plug them into eq 1
:
3d+d+(d/2)=175......multiply all terms by 2
:
6d+2d+d=350
:
9d=350
:
{{{highlight(d=38.89)}}}dollars raised by dawn
{{{highlight(h=38.89/2=19.44)}}}dollars raised by harry
{{{highlight(t=38.89(3)=116.67)}}}dollars raised by tina