Oliver incorrectly solved the equation 2x + 4=10. He says the solution is x=7

a. What is the correct solution?

b. What mistake might Oliver have made?

(A). the correct solution is = 2x+4=10

2x=10-4 (Collection of terms).

2x=6 (Divide by the coefficient of the unknown (x).

: 2x/2=6/2

x=3

(B). the mistake oliver made was that he added the equation instead of subtracting it = 10+4, instead of 10-4. before dividing.

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