How do you evaluate the expression 6x + 2y + 5y + 7 +y if x=8, y=1?

Question

1917 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-04T23:39:17

See a solution process below:

For each occurrence of #color(red)(x)# substitute #color(red)(8)#

And, For each occurrence of #color(blue)(y)# substitute #color(blue)(1)#

#6color(red)(x) + 2color(blue)(y) + 5color(blue)(y) + 7 + color(blue)(y)# becomes:

#(6 xx color(red)(8)) + (2 xx color(blue)(1)) + (5 xx color(blue)(1)) + 7 + color(blue)(1)#

#48 + 2 + 5 + 7 + 1#

#50 + 12 + 1#

#62 + 1#

#63#