To find a we will minus b + c from 17 222. a + b + c = 17 222 a + (9142) = 17 222 a + 9142 (- 9142) = 17 222 (- 9142) <u>a = 8080 </u> To find c we will take the equation " a + c = 13 201 " and substitute a to "<u>a = 8080" </u>a + c = 13 201 (8080) + c = 13 201 8080 (-8080) + c = 13 201 (-8080) <u>c = 5121</u>
And then to find b we will take the equation " a + b + c= 17 222 " and substitute 'a' and 'c' for their solved numbers. a + b + c = 17 222 (8080) + b + (5121) = 17 222 b + (13201) = 17 222 b + 13201 (-13 201) = 17 222 (-13 201) <u>b = 4021</u>
And to check answer we will substitute all variable for their found answers. a + b + c = 17 222 (8080) + (4021) + (5121) = 17 222
Children = 8080 Men = 4021 Women = 5121
Tada! haha
Hope that helps. For these questions, it's a good idea to write them out as I did in the beginning to get a feel for them....
a + b + c = 17 222 b + c = 9142 a + c = 13 201
and then try to isolate and solve one variable and then go from there. :D
