Question

Помогиие пж решить уравнения a)a-6781=6781 b)67459-b=9999 c)(524-x)-133=207 d)98-((45+z)-38)= 42 решите полностью срочно пж

Answer 1

a)[a=0]6781-6781=0

b)[b=57 460]67459-9999=57 460

c)[184]133+207=340,524-340=184

d)[49]98-42=56,56+38=94,94-45=49

Answer 2

a) a - 6781 = 6781

To solve for "a", we can add 6781 to both sides of the equation:

a - 6781 + 6781 = 6781 + 6781 a = 13562

Therefore, the solution for "a" is 13562.

b) 67459 - b = 9999

To solve for "b", we can subtract 9999 from both sides of the equation:

67459 - b - 9999 = 9999 - 9999 57460 - b = 0

Then, we can add "b" to both sides of the equation:

57460 - b + b = 0 + b 57460 = b

Therefore, the solution for "b" is 57460.

c) (524 - x) - 133 = 207

To solve for "x", we can add 133 to both sides of the equation:

(524 - x) - 133 + 133 = 207 + 133 524 - x = 340

Then, we can subtract 524 from both sides of the equation:

524 - x - 524 = 340 - 524 -x = -184

Finally, we can multiply both sides of the equation by -1 to isolate "x":

(-1)(-x) = (-1)(-184) x = 184

Therefore, the solution for "x" is 184.

d) 98 - ((45 + z) - 38) = 42

To solve for "z", we can simplify the expression within the parentheses first:

98 - ((45 + z) - 38) = 42 98 - (45 + z - 38) = 42 98 - (7 + z) = 42

Then, we can subtract 98 from both sides of the equation:

98 - (7 + z) - 98 = 42 - 98 -7 - z = -56

Finally, we can add 7 to both sides of the equation:

-7 - z + 7 = -56 + 7 -z = -49

Multiplying both sides of the equation by -1 will give us the solution for "z":

(-1)(-z) = (-1)(-49) z = 49

Therefore, the solution for "z" is 49.