1/5 of Heidi's savings was equal to 3/7 of Joseph's savings. After Heidi spent $356 and Joseph saved an additional $428; they had an equal amount of money in their savings. How much did Heidi and Joseph save altogether in the end?
1/5 h = 3/7 j re-arrange
h = 15/7 j
h -356 = j+428 sub in the red equation for h
15/7 j -356 = j+428 then you can solve for j use this value to solve for h
then subtract 356 from h and add 428 to j ( the results should be the same) and add them together.....