Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{90 \: dollars}}}}}[/tex]
Step-by-step explanation:
Total amount of money that Rob had = $ 210
Total amount of money that he spent = [tex] \sf{ \frac{4}{7} \times 210} = \: 120 \: dollars[/tex]
Finding the amount of remaining money
[tex] \boxed{ \sf{total \: amount \: of \: money \: that \: he \: had \: - \: total \: amount \: of \: money \: that \: he \: spent}}[/tex]
[tex] \dashrightarrow{ \sf{210 - 120}}[/tex]
[tex] \dashrightarrow{ \sf{90 \: dollars}}[/tex]
Hope I helped!
Best regards! :D
