Question

if a-b is 6 more than c+d and a+b is 3 less than c-d then a-c is?

Answer 1

a-b=c+d+6
a-c=d+6+b ---------(1)

and
a+b=c-d-3
a-c=-d-3-b ---------(2)
add 1 and 2
2a-2c=3
a-c=3/2

Answer 2

@robertfrost

Answer 3

a-b-6=c+d (Equation 1)
a+b+3=c-d (eqt 2)
so now isolate:
a-c=b+d+6 (eqt 1)
a-c=-b-d-3 (eqt 2)
so now sub each one into each other
eqt 1= eqt 2
a-c=a-c
b+d+6=-b-d-3
2b+2d+9
i'm stuck... this is as far as i got

Answer 4

dont euate just add them up

Answer 5

@dg98