Question

A) 7(x-1)+4,5=2(x-1)+9,12 b) 5x-12,304=3x-5,304

Answer 1

A) 7(x-1)+4,5 = 2(x-1)+9,12
7x-7+4,5 = 2x-2+9,12
7x-2,5 = 2x+7,12
7x-2x = 7,12+2,5
5x = 9,62
x = 1,92.

B) 5x-12,304 = 3x-5,304
5x-3x = -5,304+12,304
2x = 7
x = 3,5.

J'espère aidé :)

Answer 2

7x-7 + 4,5 = 2x-2 +9,12
7X-2x = -2+9.12-4.5
5x = 2,62
x= 2,62 / 5

5x-12,304 = 3x-5,304
5x+3x = -5,304 +12,304
8x = 7000
x= 875