Question

If rs = 23 - 2x st = 9x -5 and rt = 39 find rs

Answer 1

Answer:

$rs=17\ units$

Step-by-step explanation:

we know that

$rt=rs+st$

we have

$rt=39\ units$

$rs=(23-2x)\ units$

$st=(9x-5)\ units$

substitute the given values and solve for x

$39=(23-2x)+(9x-5)$

$39=(7x+18)$

$7x=39-18$

$7x=21$

$x=3$

Find the value of rs

substitute the value of x

$rs=23-2(3)=17\ units$