Question

Given that 4x - 5y = 12 find y when x= -3

Answer 1

y ⁻²⁴⁄₅ or - 4.8

Step-by-step explanation:

4x - 5y = 12

x = -3

• Insert -3 for 'x' in the equation

4(-3) - 5y = 12

• Remove the parentheses: (-a) = -a

-4 · 3 - 5y = 12

• Multiply 4 · 3: 12

-12 - 5y = 12

• Add 12 to both sides of the equation

-12 - 5y + 12 = 12 + 2

• Simplify

-5y = 24

• Divide both sides by -5

-5y / -5 = 24 / -5

• Simplify

y = ⁻²⁴⁄₅

• Turn the fraction into a decimal

y = -4.8