Select all the equations that are true
A. 18x - 6 = 6(3x-1)
B. 12m - 21 = 3(4m -7)
C. -3x -1 = -1(3x+1)
D. 14a + 21b = 7(2a+ 21b)
E. -5x - 15y - 20 = -5(x+3y+4)
Answers
Answered by
1
Answer:
no d,e are Rong because 7 multiple to 21b
Answered by
0
Answer:
A, B, C and E are correct.
Only D is incorrect.
Step-by-step explanation:
A. 6(3x-1) = 6 × 3x - 6 × 1 = 18x - 6.
B. 3(4m - 7) = 3 × 4m - 3 × 7 = 12m - 21.
C. -1(3x + 1) = -1 × 3x - 1 × 1 = -3x - 1.
D. 7(2a + 21b) = 7 × 2a + 7 × 21b = 14a + 147b.
E. -5 (x + 3y + 4) = -5x - 15y - 20.
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