Question

James and Kathryn together had $190 in a savings bank. The amount in James's account was $30 more than 3 times the amount in Katherine's account. How much had each?

Answer 1

Kathyrn had `40` dollars
James had `150` dollars

Explanation:

Let `J` be James's amount
Let `K` be Kathyrn's amount

`J+K= 190`
`J= 3K+30`

To Solve substitute for J in the first equation:
`(3K+30)+K=190`
`4K+30=190`
`4K=160`
`K=40` dollars

To solve for J substitute K into the first equation:
`J+40=190`
`J=150` dollars