a)3(2x-1)-2(1-x)=x+9 b)-3(2x-1)-2(1-x)=x+9(1-x) c)(1-x)(2x-1)-2(2-x)(2+x)=x+9 10/07/2021 Bởi Reagan a)3(2x-1)-2(1-x)=x+9 b)-3(2x-1)-2(1-x)=x+9(1-x) c)(1-x)(2x-1)-2(2-x)(2+x)=x+9
Đáp án: Giải thích các bước giải: b) -3(2x – 1) – 2(1 – x) = x + 9(1 – x) <=> -6x + 3 – (2 – 2x) = x + 9 – 9x <=> -6x + 3 – 2 + 2x – x + 9x = 9 <=> 4x = 8 <=> x = 2 VẬY x = 2 c) (1 – x)(2x – 1) – 2(2 – x)(2 + x) = x + 9 <=> 2x – 1 – 2x² + x – (4 – 2x)(2 + x) – x = 9 <=> 2x – 1 – 2x² + x – (8 + 4x – 4x – 2x²) – x = 9 <=> 2x – 1 – 2x² + x – 8 – 4x + 4x + 2x² – x = 9 <=> 2x = 18 <=> x = 9 VẬY = 9 MIK LÀM b và C NHÉ Bình luận
Bạn tham khảo nhé a) 3(2x – 1) – 2(1 – x) = x + 9 <=> 6x – 3 – (2 – 2x) = x + 9 <=> 6x – 3 – 2 + 2x – x = 9 <=> 7x = 14 <=> x = 2 Vậy x = 2 b) -3(2x – 1) – 2(1 – x) = x + 9(1 – x) <=> -6x + 3 – (2 – 2x) = x + 9 – 9x <=> -6x + 3 – 2 + 2x – x + 9x = 9 <=> 4x = 8 <=> x = 2 Vậy x = 2 c) (1 – x)(2x – 1) – 2(2 – x)(2 + x) = x + 9 <=> 2x – 1 – 2x² + x – (4 – 2x)(2 + x) – x = 9 <=> 2x – 1 – 2x² + x – (8 + 4x – 4x – 2x²) – x = 9 <=> 2x – 1 – 2x² + x – 8 – 4x + 4x + 2x² – x = 9 <=> 2x = 18 <=> x = 9 Vậy x = 9 Bình luận
Đáp án:
Giải thích các bước giải:
b) -3(2x – 1) – 2(1 – x) = x + 9(1 – x)
<=> -6x + 3 – (2 – 2x) = x + 9 – 9x
<=> -6x + 3 – 2 + 2x – x + 9x = 9
<=> 4x = 8
<=> x = 2
VẬY x = 2
c) (1 – x)(2x – 1) – 2(2 – x)(2 + x) = x + 9
<=> 2x – 1 – 2x² + x – (4 – 2x)(2 + x) – x = 9
<=> 2x – 1 – 2x² + x – (8 + 4x – 4x – 2x²) – x = 9
<=> 2x – 1 – 2x² + x – 8 – 4x + 4x + 2x² – x = 9
<=> 2x = 18
<=> x = 9
VẬY = 9
MIK LÀM b và C NHÉ
Bạn tham khảo nhé
a) 3(2x – 1) – 2(1 – x) = x + 9
<=> 6x – 3 – (2 – 2x) = x + 9
<=> 6x – 3 – 2 + 2x – x = 9
<=> 7x = 14
<=> x = 2
Vậy x = 2
b) -3(2x – 1) – 2(1 – x) = x + 9(1 – x)
<=> -6x + 3 – (2 – 2x) = x + 9 – 9x
<=> -6x + 3 – 2 + 2x – x + 9x = 9
<=> 4x = 8
<=> x = 2
Vậy x = 2
c) (1 – x)(2x – 1) – 2(2 – x)(2 + x) = x + 9
<=> 2x – 1 – 2x² + x – (4 – 2x)(2 + x) – x = 9
<=> 2x – 1 – 2x² + x – (8 + 4x – 4x – 2x²) – x = 9
<=> 2x – 1 – 2x² + x – 8 – 4x + 4x + 2x² – x = 9
<=> 2x = 18
<=> x = 9
Vậy x = 9