Thread by @ivcmath

Solving linear equations.
Solución de ecuaciones lineales (primer grado).

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If 4m − 6 = 18, what is the value of 2m + 3?

(A) 15
(B) 18
(C) 9
(D) 11

When the integer n is divided by 2, the quotient is u and the remainder is 1. When the integer n is divided by 5, the quotient is v and the remainder is 3. Which one of the following must be true?
(A) 2u+5v=4
(B) 2u–5v=2
(C) 4u+5v=2
(D) 4u–5v=2
(E) 3u–5v=2
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