Answer:
first answer is -10
second answer is 10
third answer is -2
fourth answer is 2
Explanation:
Explanation to get the answers:
you plug in the b c d and a
depending on what your abc and d are will depend on how the equation goes
like for example if the equation is
a x (c) - (-d) + b
and a=5, b=8, c=10, d=15
then you plug 5 where a is
plug in 10 where c is
plug 15 where d is as a negative
and lastly plug 8 where b is
if you have a calculator/graphing calculator i would use it to help answer these equations
a graphing calculator solves it for you without doing all the extra work like you would on a regular calculator
i use the graphing calculator to help solve equations like this specific one and it works very well
i hope my answers and explanation helps you :)