Tính trung bình và độ lệch tiêu chuẩn về thời gian chơi game online trong một tuần (xắc suất thống kê toán kỹ thuật )

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3

hi,

i'm 75% sure the answer is 1,1 to both lines.

have a great day

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