Question

How many solutions does the equation −3y + 3y + 4 = 4 have?

Answer 1

what do you think?

Answer 2

try plugging in y = 1,2 and 3 and see what you get

Answer 3

infinitly many

Answer 4

@welshfella

Answer 5

right

Answer 6

The work of a student to solve the equation 3(3y − 8) = 10 + 3y is shown below:

Step 1: 3(3y − 8) = 10 + 3y
Step 2: 6y − 5 = 10 + 3y
Step 3: 3y − 5 = 10
Step 4: 3y = 15
Step 5: y = 5

In which step did the student first make an error and what is the correct step?

Answer 7

can you help me with one more?

Answer 8

any real number can be substituted for y and the equation will still hold