hudson9020 hudson9020
  • 03-01-2018
  • Mathematics
contestada

4a + 6b = 10 2a - 4b equals 12 what does 12a equal

Respuesta :

anchitthawi
anchitthawi anchitthawi
  • 04-01-2018
4a+6b=10 ----(1)
2a-4b=12 ----(2)
(2)*2; 4a-8b=24----(3)
(1)-(3); 6b-(-8b) = 10-24
14b = -14
so b = -1
then 2a-4(-1)=12
2a+4=12
2a = 8
so a = 4
then 12a = 12*4 = 48 #
Answer Link

Otras preguntas

What are marriage rites?​
Which of the following is the correct chemical formula for Ca and F? CaF Ca2F CaF2
Which system of equations represents the matrix shown below?
A paleontologist finds a relative complete skeleton but isn't sure if it is an ape fossil or a hominid fossil. Which of the following features would help distin
PLEASE HELP !! (4/5) -50 POINTS-
16. Expand (2x - 1)(x - 3).A. 2x2 - 7X+3 B. 2x2 +7x+3C. 2x2-7X-3 D. 2x2+7X-3 E. x2+7X-3​
Read the sentence in English, and then choose the sentence in Spanish that expresses the same meaning. Marsha's mom is worried about Marsha driving too fast on
Type the correct answer in the box. Use numerals instead of words. Find the area of this shape. 4 cm 2 cm 4 cm 4 cm 5.75 cm The area of the shape is square cent
HELP!!! Plato Biology closed out and all I had left was Final. Anyone have examples of the 50 questions so I can study
Simplify to create an equivalent expression. -3(2+4k)+7(2k-)