Question

reduce 3x+7y-21=0 to intercept form.​

Answer 1

X INTERCEPT

Replace ''y'' with 0

So,

$\sf{3x + 7(0) - 21 = 0}$

$\sf{3x - 21 = 0}$

$\sf{3x = 21}$

$\sf{x = \dfrac{21}{3}}$

$\sf\fbox{x = 7}$

Y INTERCEPT

Replace "x" with 0

So,

$\sf{3(0) + 7y - 21 = 0}$

$\sf{7y = 21}$

$\sf{y = \dfrac{21}{7}}$

$\sf\fbox{y = 3}$