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sashaice [31]
3 years ago
10

Three times a number plus 12 minus 5 times the same number is 22

Mathematics
2 answers:
Dimas [21]3 years ago
5 0
Three times (3 ·) a number (x) plus (+) 12 minus (-) 5 times (·) the same number (x) is (=) 22

3x + 12 - 5x = 22   Combine like terms (3x and -5x)
      -2x + 12 = 22   Subtract 12 from both sides
              -2x = 10   Divide both sides by -2
                 x = -5
Luba_88 [7]3 years ago
4 0
1. a number is represented by "x" 

<span>3x + 12 - 5x = 22 </span>
<span>12 - 2x = 22 </span>
<span>-2x = 10 </span>
<span>x = -5 </span>


<span>2. (45) + (45) + (45 + 6x) = 303 </span>
<span>job 1, 2, 3 equals total for the day </span>

<span>135 + 6x = 303 </span>
<span>6x = 168 </span>
<span>x = 28 
</span>
<span>the plumbers hourly rate is $28/hr</span>
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