Question

1) 4(20-2x)=8(29+x)2) 7(6x-15)=-35(x+10)​

Answer 1

Ответ:
1)х=-7
2) х=-3.(18)
Пошаговое объяснение:
1)
4(20-2х)=8(29+х)
4*20-4*2х=8*29+8*х
120-8х=232+8х
120-232=16х
-112=16х
х=-7
2)
7*6х-7*15=-35*х-35*10
42х-105=-35х-350
77х=-245
Х=-3.(18)

Answer 2

Let's solve each equation step by step:

1. 4(20-2x) = 8(29+x)

First, let's simplify both sides of the equation:

80 - 8x = 232 + 8x

Now, let's isolate the variable terms on one side and the constant terms on the other side:

-8x - 8x = 232 - 80

-16x = 152

Next, divide both sides of the equation by -16 to solve for x:

x = 152 / -16

Simplifying the division gives:

x = -9.5

So the solution to the equation is x = -9.5.

2. 7(6x-15) = -35(x+10)

Again, let's simplify both sides of the equation:

42x - 105 = -35x - 350

Now, let's isolate the variable terms on one side and the constant terms on the other side:

42x + 35x = -350 + 105

77x = -245

Next, divide both sides of the equation by 77 to solve for x:

x = -245 / 77

Simplifying the division gives:

x = -3.1818...

Rounding to a few decimal places, we get:

x ≈ -3.182

So the solution to the equation is x ≈ -3.182.