1 a) 2x – ( 3-5x) – 4(x+3) b) 5-(6-x) – 4(3-2x) c) 4(x+3) -(-7x) + 17 d) 5(x-3) – 4 – 2 (x-1) +7 29/10/2021 Bởi Eliza 1 a) 2x – ( 3-5x) – 4(x+3) b) 5-(6-x) – 4(3-2x) c) 4(x+3) -(-7x) + 17 d) 5(x-3) – 4 – 2 (x-1) +7
a) 2x – ( 3-5x) – 4(x+3) \(= 2x – 3 + 5x – 4x – 12\\= 3x – 15\) b) 5-(6-x) – 4(3-2x) \(= 5 – 6 + x – 12 + 8x\\= 9x – 13\) c) 4(x+3) -(-7x) + 17 \(= 4x + 12 + 7x + 17\\= 11x + 29\) d) 5(x-3) – 4 – 2 (x-1) +7 \(= 5x – 15 – 4 – 2x + 2 + 7\\= 3x – 10\) Bình luận
Đáp án: Giải thích các bước giải: a,2x-(3-5x) – 4(x+3) =2x-3+5x-4x-12 =3x-15 b,5-(6-x)-4(3-2x) =5-6+x-12+8x =9x-12 c,4(x+3) -(-7x)+17 =4x+12+7x+17 =11x+29 d,5(x-3)-4-2(x-1)+7 =5x-15-4-2x+2+7 =3x-10 Chúc bạn học tốt! Bình luận
a) 2x – ( 3-5x) – 4(x+3)
\(= 2x – 3 + 5x – 4x – 12\\= 3x – 15\)
b) 5-(6-x) – 4(3-2x)
\(= 5 – 6 + x – 12 + 8x\\= 9x – 13\)
c) 4(x+3) -(-7x) + 17
\(= 4x + 12 + 7x + 17\\= 11x + 29\)
d) 5(x-3) – 4 – 2 (x-1) +7
\(= 5x – 15 – 4 – 2x + 2 + 7\\= 3x – 10\)
Đáp án:
Giải thích các bước giải:
a,2x-(3-5x) – 4(x+3)
=2x-3+5x-4x-12
=3x-15
b,5-(6-x)-4(3-2x)
=5-6+x-12+8x
=9x-12
c,4(x+3) -(-7x)+17
=4x+12+7x+17
=11x+29
d,5(x-3)-4-2(x-1)+7
=5x-15-4-2x+2+7
=3x-10
Chúc bạn học tốt!