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. At McDonalds, a packet of ranch dressing has 10 more calories than eight side salads?

. At McDonalds, a packet of ranch dressing has 10 more calories than eight side salads. Three side salad s and two packets of ranch dressing have a total of 400 calories. How many calories are in each item?

Pregunta de Matemáticas · 1 respuesta · mejor respuesta de ThuLuisito7

En resumen

X = 8y + 10 ec. 1 2x + 3y = 400 ec. 2 replacing x from ec. 1 to ec. 2 : 2 * (8y + 10) + 3y = 400 16y + 20 + 3y = 400 19y + 20 = 400 19y = 400 - 20 19y = 380 y = 380 / 19 y = 20 20 calories in each side salad. Now on ec.

Respuestas de la comunidad

Mejor respuesta

ThuLuisito7
1

X = 8y + 10 ec.

1

2x + 3y = 400 ec.

2

replacing x from ec.

1 to ec.

2 :

2 * (8y + 10) + 3y = 400

16y + 20 + 3y = 400

19y + 20 = 400

19y = 400 - 20

19y = 380

y = 380 / 19

y = 20

20 calories in each side salad.

Now on ec.

1 :

x = 8y + 10

x = 8 * 20 + 10

x = 160 + 10

x = 170

170 calories in each ranch dressing.

Check it out ion ec.

2 :

2x + 3y = 400

2 * 170 + 3 * 20 = 400

340 + 60 = 400

400 ≡ 400

Regards.

Preguntas frecuentes

. At McDonalds, a packet of ranch dressing has 10 more calories than eight side salads?

X = 8y + 10 ec. 1 2x + 3y = 400 ec. 2 replacing x from ec. 1 to ec.