1) 2.9y-4(1.2-y)=5.4 (y+2) 2)3/4x - (3/4-2x)= 1 1/2 + x

Question

1) 2.9y-4(1.2-y)=5.4 (y+2) 2)3/4x - (3/4-2x)= 1 1/2 + x

Answer 1

2.9y-4(1.2-y)=5.4 (y+2)
2,9у-4,8+4у=5,4у+10,8
2,9у+4у-5,4у=10,8+4,8
1,5у=15,6
у=15,6:1,5
у=10,4

3/4x - (3/4-2x)= 1 1/2 + x
3/4х - 3/4 + 2х = 3/2 + х
3/4х + 2х - х = 3/2+3/4
3/4х + х = 6/4+3/4
1 3/4х = 9/4
7/4х = 9/4
х= 9/4 : 7/4
х= 9/4 * 4/7
х= 9/7 = 1 1/7

Comments

1 целая 1/2 там, а не 11/2

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Там пробел стоит