Fix the Mistakes Elba and Jorge each made an error in the first two steps of solving the equation
2(x + 4) - 7 = 21 - 3(2 + x).
Determine the error each student made. Then, solve the equation.
Elba's Work
Jorge's Work
2(x + 4) - 7 = 21 - 3(2 + x)
2(x + 4) - 7 = 21 - 3(2 + x)
2x + 4 - 7=21 - 6+ x
2x + 8 -7 = 21 - 6 + 3x
2x - 3= 15 +2
2x + 1 = 15 + 3x
X - 3 = 15
2x = 14 + 3x
= 18
-x = 14
x = -14
Error:
Error:
My Work
2(x+4) - 7=21 - 3(2+x).

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6