The basic principle of algebra is the equal sign.
Whatever you do to one side you must do to the other.
Try to rearrange the terms in such a way that you isolate or solve the variable.
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In a way yes, Algebra 2 is essential in order for you to comprehend topics which will be in algebra. Such as finding the slope of perpendicular lines and parallel lines, those topics are presented to you in Algebra 2 and if you understand them at least 45% then by the time you get to college algebra that knowledge will be reinforced
yes. to understand the higher maths you need pre algebra
The easiest way to solve an algebra problem is to work out the problem.
Algebra is basically arithmetic with variable expressions, trigonometry comes after algebra because you need algebra to understand sine, cosine, tangent, as well as secant, cosecant, and cotangent.
I think you need to understand algebra 2 before you begin trigonometry