Question

What does 'for' mean in maths?
for example,thus sum:
2x=12 for 3x+2y=13.
(i want the sum to be solved with full explanation and the use of for)​

Answer 1

Step-by-step explanation:

• 2x = 12
• x = $\frac{12}{2}$
• x = 6

Now

Substitute "x" value in above given equation

• 3x + 2y = 13
• 3 ( 6 ) + 2y = 13
• 18 + 2y = 13
• 2y = 13 - 18
• 2y = -5
• y = $\frac{-5}{2}$
• y = -2.5