5p - 3q = -39
- (-2p - 3q = 3)
==> 7p = -42 ==> p = -6
==> p = -6
-2(-6) - 3q = 3 ==> 12 - 3q = 3
==>p = -6
-3q = 3 - 12 ==> -3q = -9
==> p = -6
q = 3
Answer:
They are 12 girls in class
Step-by-step explanation:
we need the equation or graph to figure that out
<h3><u>Ⲁⲛ⳽ⲱⲉⲅ:</u></h3>
- <u>▶( x - 3 ) ( 3x - 6 )</u>
<h3><u>Ⲋⲟⳑⳙⲧⳕⲟⲛ :</u></h3>
ㅤㅤㅤ➙ 3x² - 15x + 18
ㅤㅤㅤ➙ 3x² - 9x - 6x + 18
ㅤㅤㅤ➙ 3x ( x - 3 ) + 6 ( - x + 3 )
ㅤㅤㅤ➙ 3x ( x - 3 ) - 6 ( x - 3 )
ㅤㅤㅤ➙ <u>( x - 3 ) ( 3x - 6 )</u>
Lisa is 50 years
Sam is 50 / 2 = 25 years
Brad is 25 * 3 = 75 years
