Question

what should be added to (-4/15 + 7/10) to get 1.​

Answer 1

Step-by-step explanation:

SOLUTION;

LET, THE UNKNOWN NUMBER BE X,

(-4/15 + 7/10) + X = 1

1 - (-4/15 + 7/10) = X

1- ( -8 /30 + 21/30) = X

1- ( 13/30) = X

30/30 - 13 /30 = X

17/30 = X

THANKS

Answer 2

Answer:

11/10 should be added

explaination

Let the no. be X

(-4/5+7/10) + X= 1

LCM of 5 and 10 is 10

(-4/5 ×2/2 + 7/10) +X= 1

( -8/10+7/10) +X = 1

( -8+7/10)+X= 1

( -1/10)+X= 1

(-1/10)-1/1= (-X)

LCM of 10 and 1 is 10

(-1/10)-1/1×10/10 = (-X)

-1/10- 10/10= (-x)

-1-10/10 = (-X)

- 11/10= (-X)

11/10= X