Question 105987
w=woman's age
m=man's age
.
A) w=7m/10
B) w+4=8(m+4)/11
.
A) 10w=7m
10w-7m=0
B) 11(w+4)=8(m+4)
11w+44=8m+32
11w-8m=32-44
11w-8m=-12
.
*[invoke solving_linear_system_by_substitution 10, -7, 0, 11, -8, -12]
Check:
w=28, m=40
28=7*40/10...28=280/10 true
28+4=8*44/11...32=8*4 true
Ed