Question about Mathsoft StudyWorks! Mathematics Deluxe 5.0 (11513) for PC
They are 4 years old and the mother is 32. This is a system of two equations. The first equation is 28 + x (their mother is 28 years older than they are). The second equation is 8x (she is 4 times as old as their sum) their sum is 2x (x being the twins age) time 4 which is 8x. Set these two equal to each other and you get 28 + x = 8x, bring the x to the other side by subtracting and x on both sides and you end up with 28=7x , now divide off the 7 and get x=4. Verify your work and take 4 + 28 and you get 32. Now take 4*2 (sum of their ages ) and multiply it by 4 and you get 32.
Posted on Jun 26, 2009
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Posted on Jan 02, 2017
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