Question

{5a+3b = 42
{3a - b = 14

Es para hoy...

Answer 1

Simplifying 5a + 4b + -2a + 3b = 0 Reorder the terms: 5a + -2a + 4b + 3b = 0 Combine like terms: 5a + -2a = 3a 3a + 4b + 3b = 0 Combine like terms: 4b + 3b = 7b 3a + 7b = 0 Solving 3a + 7b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7b' to each side of the equation. 3a + 7b + -7b = 0 + -7b Combine like terms: 7b + -7b = 0

Answer 2

5a=42-3b
a=42/5-3/5b

3(42/5-3/5b)-b=14
126/5-9/5b-b=14
-9/5b-b=14-126/5
-14/5b=-56/5
b= -56/5 : -14/5

b=4
a=42/5-3/5*4
a=6