Question 999160
Let's call the hours at 30 x and the hours at 41 y:
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x+y= 7 Subtract x from both sides: y= 7-x Let's use this value for y:
30x+41y = 265
30x+41(7-x)= 265 Multiply on left to get rid of the parenthesis:
30x+287-41x= 265 
-11x= -22 Divide both sides by -11
x= -22/-11 And remember that -/- = +
x= 2 She drove at 30mph for 2 hours. And:
7-2= 5 hours at 41mph
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Proof:
30*2= 60
41*5= 205
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Total: 265 We have the correct answer