M a sh q l a r

Tenglamani yeching (85–96):

85.

1) 11x=50; 2) –9x=243; 3) 4x=0,24; 4) 7x=7,063.

86.

1) 9x=; 2) 3x=; 3) x=3; 4) x==.

87.

1) 0,3x=6; 2) 1,3x=–1,69; 3) 0,7 x=49; 4) 10x=0,5.

88.

1) 8x=8; 2) x=16; 3) 3²x=243; 4) 16x=16.

89.

1) 5x=; 2) 4x=; 3) –0,1x=10³; 4) –0,3x=10².

90.

1) 25x–1=9; 2) 7x+8=11; 3) 3x–5=10–x; 4) 4x+4= x+5.

91.

1) 5x+3(3x+7)=35; 2) 8x–(7x+8)=9;

3) 8y–9–4y+5=12y–4–5y; 4) 4+8y+8=2y–10–7y+9.

92.

1) =; 2) =; 3) =8; 4) =14.

93.

1) 3y+5=4(9–); 3) 3(5+)=4+2x;

2) 8(11–z)=16z–44; 4) 2(3–)=5+x.

94.

1) 0,71x+1,98=0,37x– 1,76; 2) 0,18y–7,4=0,05y–5,71;

3) 5(5x–1)–2,7x+0,2x=6,5–0,5x; 4) 0,36x–0,6=0,3(0,4x–1,2).

95.

1) ; 3) ;

2) ; 4) .

96.

1) ; 3) ;

2) ; 4) .

97. Tenglamani ildizlarga ega emasligini ko‘rsating:

1) 28–20x=2x+25–16x–12–6x;

2) 25x–17=4x–5–13x+14+34x;

3) ; 4) .

98. x ning istagan qiymati tenglamaning ildizi bo‘la olishini ko‘rsating:

1) 10–4x+3=9x–2–6x+9–7x+6;

2) 9x+4–5x=8+7x–9–3x+5;

3) 6(1,2x–0,5)–1,3x=5,9x–3;

4) 8(1,3x+0,25)–6,6x=3,8x+2.

99. Tenglamani yeching:

1) (x–2)(x–1)–x²=5;

2) (x+2)(x–3)=x²–7;

3) (3x+2)(x–1)–3(x+1)(x–2)=4;

4) 2(x+3)(x–4)=(2x–1)(x+2)–27.

100. Tenglamani yeching:

1) ; 3) 4,2:(2x–7)=10:7;

2) ; 4) 4:10=4,5:(3x–1).