What is 4x+3 I can’t solve it can y’all please help me

To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations.

Step-by-step explanation: In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression.

i think it would be 42cm