[tex]3 \times a = 21[/tex]
[tex]a = \frac{21}{3} [/tex]
[tex]a = 7[/tex]
[tex]b \times 10 = 20[/tex]
[tex]b = \frac{20}{2} [/tex]
[tex]b = 10[/tex]
[tex]24 \div c = 8[/tex]
[tex] \frac{24}{c} = 8[/tex]
[tex]24 = 8c[/tex]
[tex]8c = 24[/tex]
[tex]c = \frac{24}{8} [/tex]
[tex]c = 3[/tex]
[tex]d \div 2 = 9[/tex]
[tex] \frac{1}{2} d = 9[/tex]
[tex]d = 18[/tex]
[tex]m + m + m =18[/tex]
[tex]3m = 18[/tex]
[tex]m = \frac{18}{3} [/tex]
[tex]m = 6[/tex]
