Question

Diketahui titik (a, b) merupakan titik potong garis y=3x-8 dan x+y=12. tentukan nilai dari a + b!

Answer 1

Verified answer

Y = 3x - 8
y - 3x = - 8
y + x = 12
-----------------(-)
- 4x = - 20
x = 5

y + x = 12
y + 5 = 12
y = 12 - 5
y = 7

hp = {5,7}

a + b = 5 + 7 = 12

Answer 2

I. y= 3x-8
ii. y = 12-x

y = y
3x - 8 = 12-x
3x + x = 12 + 8
4x = 20
x = 5

x + y = 12
5 + y = 12
y = 12 - 5 = 7

a = x = 5
b = y = 7
a+b = 5 + 7 = 12