Atextbook store sold a combined total of 426 math and sociology textbooks...
m=s+88 we are also told that:
m+s=426, using m found above in this equation gives you:
s+88+s=426 combine like terms on left side
2s+88=426 subtract 88 from both sides
2s=338 divide both sides by 2
s=169, since m=s+88
So 257 math and 169 sociology textbooks were sold.
not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove.
an inaccurate proof leads to errors, or stating results that are not accurate. which wil mess the probelm up you dont want this