The sum of 3 times a number and 4 is between -8 and 10. Define a variable, write an inequality, and solve the problem.
1 answer:
let the number be x
-8<3x+4<10
-12<3x<10
-4<x<10/3
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2x + 2 = 3x - 52
-2x -2x
2 = 1x - 52
+52 +52
54 = 1x
---- ----
1 1
54 = x
Check:
2(54) + 2 = 3(54) - 52
108 + 2 = 162 - 52
110 = 110
Her best choice would be to take a fixed rate mortgage because it would let her know exactly how much she would pay each month.
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