How much 10​% solution and how much 65​% solution should be mixed together to make 100 gal of 35​% ​solution?

Thank you!!

2 answers

amount of 10% stuff ---- x gal
amount of 65% stuff ---- 100-x gal

solve for x:
.1x + .65x = .35(100)
I have a typo, sorry
should be

.1x + .65(100-x) = .35(100)