It you mean (7+12) - (3x) then always do what is inside of the parentheses first so

(7+12) is equal to 19 and (3x) is just 3x so your answer is

19 - 3x

Let me know if I have done what you needed.

]]>2 + 3 x 7 = 23.

This is because, the order of operations is

Exponentiation (generally, this doesn't figue, so this can be overlooked),

Division, Multiplication, Addition, Subtraction.

Given the problem,

find the value of

The first operation to be done is division,

since 25 divided by 5 is 5,

the value is equal to

.

The next operation to be done is multiplication,

Since 2 x 3 = 6,

.

Is the answer to this 6 or 4

]]>I need to pass a test very soon]]>

This is because, the order of operations is

Exponentiation (generally, this doesn't figue, so this can be overlooked),

Division, Multiplication, Addition, Subtraction.

Given the problem,

find the value of

The first operation to be done is division,

since 25 divided by 5 is 5,

the value is equal to

.

The next operation to be done is multiplication,

Since 2 x 3 = 6,

.

Mathematics or the operations on numbers don't change,

what changes is when to perform the operation, that is the order.

When brackets are used, the operations inside the brackets ought to be performed first.

for example,

.

It may be observed that the operations in the innermost brackets are performed first.]]>

I'm doing the VETASSESS test and untill now I had never heard of this rule.

eg 2+3 X 7=21 not 35. how can maths change]]>