Answer: 30
Explanation: Here, we have the expression 2x + 10 + 6x - 4 and we want to evaluate the expression when x is equal to 3.
To evaluate an expression, we simply plug the value
of the variable into the expression and solve.
So here, since x is equal to 3
we have 2(3) + 10 + 6(3) - 4.
Notice that I used parentheses when substituting 3 in for x.
That's always a good habit to get into.
Now we can use our order of operations from here.
2(3) is equal to 6 and 6(3) is equal to 18.
So we have 6 + 10 + 18 - 4.
6 + 10 is equal to 16.
So we have 16 + 18 - 4.
16 + 18 gives us 34.
So we have 34 - 4 which is 30.
So the value of our expression when x is equal to 3 is 30.