How do you evaluate #4( a + b - c)# given a= 2, b= 7, and c= 4?

1 Answer
Don't Memorise
Apr 30, 2016

#=20#

Explanation:

The expression provided is :
#4 ( a + b - c)#

Data provided is:
#color(blue)(a = 2) , color(green)(b = 7) , color(purple)( c= 4#
Substituting the values for the variables in the expression.

#4 ( a + b - c) = 4 ( color(blue)( 2) + color(green)( 7) -color(purple)( 4))#

# = 4 ( 9 - 4)#

# = 4 (5)#

#=20#

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