Question

Jordan solved the equation −7x + 25 = 48; his work is shown below. Identify the error and where it was made.

−7x + 25 = 48
Step 1: −7x + 25 − 25 = 48 − 25
Step 2: −7x = 23
Step 3: negative seven times x over seven = twenty-three over seven
Step 4: x = twenty-three over seven

Answer 1

In step 3, they divided -7x/7 and 23/7

They dropped their negative sign.

so -x = 23/7 or x = -23/7

Answer 2

thank you

Answer 3

No problem