3
To solve 2x + 9 = 21, what is the first step?
А. Dividing each side by 2
B
Dividing each side by x
С
Subtracting 21 from each side
D
Subtracting 9 from each side
Always start with numbers without variables first before doing anything with x. And make sure one side must not equal 0 unless you're doing polynomials.
