2 answers:
Multiply the bracket by 5
I used PEMDAS
P= parenthesis
E= exponents
M=multiplication
D= division
A= addition
S= subtraction
7r+2= 5(r-4)
7r+2= 5r-20
Move 5r to the left hand side . Positive 5r changes to negative 5r
7r-5r+2= 5r-5r-20
2r+2=- 20
2r+2-2= -20-2
Move positive 2 to the right hand side. Changes to negative -2
2r+2-2= -20-2
2r= -22
Divide by 2 for 2r and -22
2r/2= -22/2
r= -11
Answer is r= -11
Answer:
r = (-11)
Step-by-step explanation:
7r + 2 = 5(r – 4)
7r + 2 = 5r – 4 * 5
7r + 2 = 5r – 20
7r - 5r = -20 - 2
2r = -22
r = -22/2 = (-11)
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