4,8,12,16,20,24,28,32,36,40
1 meter is equal to 100 centimetres
-5 (2u+10)=2 (u_7) apply distributive property
-10u-50=2u-14 collect like terms
-10u-2u=50-14 when you move the number to the other side sign change
-12u =36 to get rid of 12 divide 12 on both sides
-12u/-12= 36/-12
U= -3
Iva got the correct answer and Lorraine's answer was incorrect. Lorraine did everything correct except 1 common mistake at the end. At the end of the problem, you have the equation 2x = 20. Instead of dividing by 2, it's possible that Lorraine mixed up the steps and divided by 10 on both sides to get x = 2. You're supposed to divide 2x by 2 and 20 by 2 to get a quotient of 10.
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