The value of b is 5 for the given equations 9 = 7 + a and a + 8 = b+5.
What is substitution method?
The substitution method is the algebraic method to solve simultaneous linear equations. In this method, the value of one variable from one equation is substituted in the other equation.
According to the given question we have , two equations
[tex]9 = 7+a...(i)[/tex]
and [tex]a + 8 = b + 5...(ii)[/tex]
From equation (i)
9 = 7 + a
⇒ a = 9 -7
⇒ a = 2
Substitute the value of a in equation (ii)
⇒ 2 + 8 = b + 5
⇒ 10 = b + 5
⇒ b = 10 -5
⇒ b = 5
Hence, the value of b is 5 for the given equations 9 = 7 + a and a + 8 = b+5.
Learn more about substitution method here:
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