The average yearly salary for an individual whose final degree is a bachelor's is $51 thousand and the average yearly salary for an individual whose final degree is a master's is $57 thousand
What is the salary of master's degree holder and that of bachelor's degree holder?
Let M be the salary of master's and B the salary of a bachelor's
M is $42k less than twice of B
M=2B-42
M+B=111
substitute for M in the second equation
2B-42+B=111
3B=111+42
3B=153
B=153/3
B=51
M=2B-42
M=(2*51)-45
M=57
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