5x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×15x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×15=66 7.2x-5.4x=12.6. 8x-3x=26. 解方程
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5x+3.2x=32.8.7.9x2-1.5x=5.3.5x+2.4×15x+3.2x=32.8.7.9x2-1.5x=5.3.5x+2.4×15=667.2x-5.4x=12.6.8x-3x=26.
5x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×15x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×15=66 7.2x-5.4x=12.6. 8x-3x=26. 解方程
5x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×1
5x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×15=66 7.2x-5.4x=12.6. 8x-3x=26. 解方程
5x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×15x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×15=66 7.2x-5.4x=12.6. 8x-3x=26. 解方程