Question

А)15x-15=420 Б)23y-569=1409 В)(12z+18)+54=900

Answer 1

На фотографии написано решение

Answer 2

To solve each of these equations, we'll follow the same steps:

1. Isolate the variable term on one side of the equation.
2. Simplify both sides of the equation.
3. Solve for the variable.

Let's solve them one by one:

А) 15x - 15 = 420

Step 1: Isolate the variable term (15x) on one side. Add 15 to both sides: 15x = 420 + 15 15x = 435

Step 2: Simplify both sides. There's nothing more we can simplify here.

Step 3: Solve for x. Divide both sides by 15: x = 435 / 15 x = 29

So, the solution is x = 29.

Б) 23y - 569 = 1409

Step 1: Isolate the variable term (23y) on one side. Add 569 to both sides: 23y = 1409 + 569 23y = 1978

Step 2: Simplify both sides. There's nothing more we can simplify here.

Step 3: Solve for y. Divide both sides by 23: y = 1978 / 23 y = 86

So, the solution is y = 86.

В) (12z + 18) + 54 = 900

Step 1: Isolate the variable term (12z + 18) on one side. Subtract 54 from both sides: 12z + 18 = 900 - 54 12z + 18 = 846

Step 2: Simplify both sides. Subtract 18 from both sides to isolate 12z: 12z = 846 - 18 12z = 828

Step 3: Solve for z. Divide both sides by 12: z = 828 / 12 z = 69

So, the solution is z = 69.

Final solutions: А) x = 29 Б) y = 86 В) z = 69