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Toán Lớp 6: a) 4 + x + 7 b) x + (-5) = -18 c) (-14) + x – 7 = -10 d) (-12) – x -(-19) = 0

Home/ Toán Lớp 6: a) 4 + x + 7 b) x + (-5) = -18 c) (-14) + x – 7 = -10 d) (-12) – x -(-19) = 0

Toán Lớp 6: a) 4 + x + 7 b) x + (-5) = -18 c) (-14) + x – 7 = -10 d) (-12) – x -(-19) = 0

Thanh Thu Tháng Tám 16, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: a) 4 + x + 7 b) x + (-5) = -18
c) (-14) + x – 7 = -10 d) (-12) – x -(-19) = 0

Comments ( 2 )

minhtuquynh
16 Tháng Tám, 2022 at 7:46 sáng

Reply

a) 4 + x = 7

x = 7 – 4

x = 3

b) x + ( – 5 ) = – 18

x = – 18 – ( – 5 )

x = – 13

c) ( – 14 ) + x – 7 = – 10

( – 14 ) + x = – 10 + 7

x = – 3 – ( – 14 )

x = 11

d) ( – 12 ) – x – ( – 19 ) = 0

( – 12 ) – x + 19 = 0

7 – x = 0

x = 7 – 0

x = 7
tonhu12
16 Tháng Tám, 2022 at 7:46 sáng

Reply

a) 4 + x = 7

x = 7 – 4

x = 3

Vậy x = 3

________________

b) x + (-5) = -18

x = -18 – (-5)

x = -18 + 5

x = -13

Vậy x = -13

__________________

c) (-14) + x – 7 = -10

(-14) + x = -10 + 7

(-14) + x = -3

x = -3 – (-14)

x = – 3 + 14

x = 11

Vậy x = 11

__________________

d) (-12) – x – (-19) = 0

(-12) – x + 19 = 0

(-12) – x = 0 – 19

(-12) – x = -19

x = -12 – (-19)

x = -12 + 19

x = 7

Vậy x = 7

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